-7x(x-2)=3x-1

Simple and best practice solution for -7x(x-2)=3x-1 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 -7x(x-2)=3x-1 equation:


Simplifying
-7x(x + -2) = 3x + -1

Reorder the terms:
-7x(-2 + x) = 3x + -1
(-2 * -7x + x * -7x) = 3x + -1
(14x + -7x2) = 3x + -1

Reorder the terms:
14x + -7x2 = -1 + 3x

Solving
14x + -7x2 = -1 + 3x

Solving for variable 'x'.

Reorder the terms:
1 + 14x + -3x + -7x2 = -1 + 3x + 1 + -3x

Combine like terms: 14x + -3x = 11x
1 + 11x + -7x2 = -1 + 3x + 1 + -3x

Reorder the terms:
1 + 11x + -7x2 = -1 + 1 + 3x + -3x

Combine like terms: -1 + 1 = 0
1 + 11x + -7x2 = 0 + 3x + -3x
1 + 11x + -7x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
1 + 11x + -7x2 = 0

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
-0.1428571429 + -1.571428571x + x2 = 0

Move the constant term to the right:

Add '0.1428571429' to each side of the equation.
-0.1428571429 + -1.571428571x + 0.1428571429 + x2 = 0 + 0.1428571429

Reorder the terms:
-0.1428571429 + 0.1428571429 + -1.571428571x + x2 = 0 + 0.1428571429

Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000
0.0000000000 + -1.571428571x + x2 = 0 + 0.1428571429
-1.571428571x + x2 = 0 + 0.1428571429

Combine like terms: 0 + 0.1428571429 = 0.1428571429
-1.571428571x + x2 = 0.1428571429

The x term is -1.571428571x.  Take half its coefficient (-0.7857142855).
Square it (0.6173469384) and add it to both sides.

Add '0.6173469384' to each side of the equation.
-1.571428571x + 0.6173469384 + x2 = 0.1428571429 + 0.6173469384

Reorder the terms:
0.6173469384 + -1.571428571x + x2 = 0.1428571429 + 0.6173469384

Combine like terms: 0.1428571429 + 0.6173469384 = 0.7602040813
0.6173469384 + -1.571428571x + x2 = 0.7602040813

Factor a perfect square on the left side:
(x + -0.7857142855)(x + -0.7857142855) = 0.7602040813

Calculate the square root of the right side: 0.87189683

Break this problem into two subproblems by setting 
(x + -0.7857142855) equal to 0.87189683 and -0.87189683.

Subproblem 1

x + -0.7857142855 = 0.87189683 Simplifying x + -0.7857142855 = 0.87189683 Reorder the terms: -0.7857142855 + x = 0.87189683 Solving -0.7857142855 + x = 0.87189683 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7857142855' to each side of the equation. -0.7857142855 + 0.7857142855 + x = 0.87189683 + 0.7857142855 Combine like terms: -0.7857142855 + 0.7857142855 = 0.0000000000 0.0000000000 + x = 0.87189683 + 0.7857142855 x = 0.87189683 + 0.7857142855 Combine like terms: 0.87189683 + 0.7857142855 = 1.6576111155 x = 1.6576111155 Simplifying x = 1.6576111155

Subproblem 2

x + -0.7857142855 = -0.87189683 Simplifying x + -0.7857142855 = -0.87189683 Reorder the terms: -0.7857142855 + x = -0.87189683 Solving -0.7857142855 + x = -0.87189683 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7857142855' to each side of the equation. -0.7857142855 + 0.7857142855 + x = -0.87189683 + 0.7857142855 Combine like terms: -0.7857142855 + 0.7857142855 = 0.0000000000 0.0000000000 + x = -0.87189683 + 0.7857142855 x = -0.87189683 + 0.7857142855 Combine like terms: -0.87189683 + 0.7857142855 = -0.0861825445 x = -0.0861825445 Simplifying x = -0.0861825445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.6576111155, -0.0861825445}

See similar equations:

| X^2-2k(x+1)-k^2=0 | | 6b^2-11b-35= | | 15=-3(x-1) | | 38=4w-26 | | 3(2+c)=2(c-3) | | 9y^2+41y-20= | | 3x-21=9x+32 | | 10u^2+15u+4u+6= | | -6p+36=12 | | 2(4t-7)=21t+8 | | (2h+7)-(h+6)+3h=9 | | (h+7)-(h+6)+3h=9 | | 9c^2+11c+4= | | 16x=9x^2 | | -7(3x+2)+6x=106 | | 4p+9=25 | | 144x^2-96x+16=4x+60 | | 7x^2-6x+1=0 | | 5w^2-8w-4= | | -15x-4x=6-3x | | -7=5x+1 | | 8x-(4x+5)=19 | | 15a^2-29a+12= | | 8x^2=24x+32 | | -3x^5-12x^4+15x^3=0 | | 2(x+4)-4(x-1)=30 | | x^2+18x+72= | | 30+x=2(10+x) | | 79-4x=32x+19 | | -7g+20=-4g+7g | | -7g+20=-4g+7 | | 6x^7-12x^4+30x^6= |

Equations solver categories