(2x+5)(x-3)=9

Simple and best practice solution for (2x+5)(x-3)=9 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 (2x+5)(x-3)=9 equation:


Simplifying
(2x + 5)(x + -3) = 9

Reorder the terms:
(5 + 2x)(x + -3) = 9

Reorder the terms:
(5 + 2x)(-3 + x) = 9

Multiply (5 + 2x) * (-3 + x)
(5(-3 + x) + 2x * (-3 + x)) = 9
((-3 * 5 + x * 5) + 2x * (-3 + x)) = 9
((-15 + 5x) + 2x * (-3 + x)) = 9
(-15 + 5x + (-3 * 2x + x * 2x)) = 9
(-15 + 5x + (-6x + 2x2)) = 9

Combine like terms: 5x + -6x = -1x
(-15 + -1x + 2x2) = 9

Solving
-15 + -1x + 2x2 = 9

Solving for variable 'x'.

Reorder the terms:
-15 + -9 + -1x + 2x2 = 9 + -9

Combine like terms: -15 + -9 = -24
-24 + -1x + 2x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-24 + -1x + 2x2 = 0

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

Divide each side by '2'.
-12 + -0.5x + x2 = 0

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + -0.5x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + -0.5x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -0.5x + x2 = 0 + 12
-0.5x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
-0.5x + x2 = 12

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 12 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 12 + 0.0625

Combine like terms: 12 + 0.0625 = 12.0625
0.0625 + -0.5x + x2 = 12.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 12.0625

Calculate the square root of the right side: 3.473110997

Break this problem into two subproblems by setting 
(x + -0.25) equal to 3.473110997 and -3.473110997.

Subproblem 1

x + -0.25 = 3.473110997 Simplifying x + -0.25 = 3.473110997 Reorder the terms: -0.25 + x = 3.473110997 Solving -0.25 + x = 3.473110997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 3.473110997 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 3.473110997 + 0.25 x = 3.473110997 + 0.25 Combine like terms: 3.473110997 + 0.25 = 3.723110997 x = 3.723110997 Simplifying x = 3.723110997

Subproblem 2

x + -0.25 = -3.473110997 Simplifying x + -0.25 = -3.473110997 Reorder the terms: -0.25 + x = -3.473110997 Solving -0.25 + x = -3.473110997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -3.473110997 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -3.473110997 + 0.25 x = -3.473110997 + 0.25 Combine like terms: -3.473110997 + 0.25 = -3.223110997 x = -3.223110997 Simplifying x = -3.223110997

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.723110997, -3.223110997}

See similar equations:

| 5-25/17 | | 3x/x-2 | | 12x+36=6x*8 | | 4-20/17 | | 12x+36=6x*.8 | | 6x-2y=-34 | | 21X-21/8/7x-7/72 | | .4(15x-20)=3(3x-4) | | f(x)=-0.02x^2+1.4x+5.3 | | 12/5x=4-x | | 2x(x+1)=6(x-4) | | 4k+7h-16=6 | | (3x^2+6x)dx+(x^3+3y^2)dy=0 | | 7/8x3/1 | | -43-2=2-6z | | 3xy+2xy+4= | | X-1/2×5/4=1/12 | | 12/5x=5-x | | X-21=40 | | 6+in(27x)=21-2in(x) | | 9y-6=12 | | x(6x-9)=0 | | 6x-7+4x+7+20x+5=180 | | m-(-13)=36 | | -(8/9)x-(-(8/9)-2) | | -160+9x=60-2x | | 4e(6x+4)=8 | | 2x+30+x+40+2x+75+3x-5=90 | | 2x+30+x+40+2x+75+3x-5=180 | | 2x+30+x+40+2x+75+3x-5=360 | | -7x-32=-11x+56 | | 3/y=12 |

Equations solver categories