(3x-10)(x+4)=180

Simple and best practice solution for (3x-10)(x+4)=180 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for (3x-10)(x+4)=180 equation:


Simplifying
(3x + -10)(x + 4) = 180

Reorder the terms:
(-10 + 3x)(x + 4) = 180

Reorder the terms:
(-10 + 3x)(4 + x) = 180

Multiply (-10 + 3x) * (4 + x)
(-10(4 + x) + 3x * (4 + x)) = 180
((4 * -10 + x * -10) + 3x * (4 + x)) = 180
((-40 + -10x) + 3x * (4 + x)) = 180
(-40 + -10x + (4 * 3x + x * 3x)) = 180
(-40 + -10x + (12x + 3x2)) = 180

Combine like terms: -10x + 12x = 2x
(-40 + 2x + 3x2) = 180

Solving
-40 + 2x + 3x2 = 180

Solving for variable 'x'.

Reorder the terms:
-40 + -180 + 2x + 3x2 = 180 + -180

Combine like terms: -40 + -180 = -220
-220 + 2x + 3x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-220 + 2x + 3x2 = 0

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
-73.33333333 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '73.33333333' to each side of the equation.
-73.33333333 + 0.6666666667x + 73.33333333 + x2 = 0 + 73.33333333

Reorder the terms:
-73.33333333 + 73.33333333 + 0.6666666667x + x2 = 0 + 73.33333333

Combine like terms: -73.33333333 + 73.33333333 = 0.00000000
0.00000000 + 0.6666666667x + x2 = 0 + 73.33333333
0.6666666667x + x2 = 0 + 73.33333333

Combine like terms: 0 + 73.33333333 = 73.33333333
0.6666666667x + x2 = 73.33333333

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = 73.33333333 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 73.33333333 + 0.1111111112

Combine like terms: 73.33333333 + 0.1111111112 = 73.4444444412
0.1111111112 + 0.6666666667x + x2 = 73.4444444412

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 73.4444444412

Calculate the square root of the right side: 8.569973421

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 8.569973421 and -8.569973421.

Subproblem 1

x + 0.3333333334 = 8.569973421 Simplifying x + 0.3333333334 = 8.569973421 Reorder the terms: 0.3333333334 + x = 8.569973421 Solving 0.3333333334 + x = 8.569973421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 8.569973421 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 8.569973421 + -0.3333333334 x = 8.569973421 + -0.3333333334 Combine like terms: 8.569973421 + -0.3333333334 = 8.2366400876 x = 8.2366400876 Simplifying x = 8.2366400876

Subproblem 2

x + 0.3333333334 = -8.569973421 Simplifying x + 0.3333333334 = -8.569973421 Reorder the terms: 0.3333333334 + x = -8.569973421 Solving 0.3333333334 + x = -8.569973421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -8.569973421 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -8.569973421 + -0.3333333334 x = -8.569973421 + -0.3333333334 Combine like terms: -8.569973421 + -0.3333333334 = -8.9033067544 x = -8.9033067544 Simplifying x = -8.9033067544

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.2366400876, -8.9033067544}

See similar equations:

| 19m-7=17 | | 5m-4m-1=-12 | | (3x-6)+(x+12)=180 | | 1.3+0.5y=3.41 | | 3x-y-5=0 | | (7x^2)-12x-4=0 | | 54+22-5(x+2)=76 | | (5w+24)+(-2t-16)=-22 | | 25q+10d+5n=80 | | (3x-6)=(x+12) | | k+(-4.21)=(-19.3) | | 710-35m=570-25m | | 16x^3=4x | | h=vt-gt^2 | | (9x-7)=(5x+1) | | 7(x+3)=10+2(4+3x) | | 710-35m=570-23m | | 3y-2=15 | | 710+35m=570+25m | | X^3=-1 | | 2x+7(2x-6)=-17-9x | | 6y-5=-3(2y+1) | | -(x+3)=3(x-5) | | 12k-2z=24 | | (2x+5)(2x+5)-(2x+5)-6=0 | | x-7.8=-5.2 | | m-7=2 | | -(3x+2)=44 | | y+28=14 | | 8x-2=-5x+18-2x | | 9x-7=21x+1 | | (2x+6)(2x+6)=6 |

Equations solver categories