x^2=4x-40

Simple and best practice solution for x^2=4x-40 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 x^2=4x-40 equation:


Simplifying
x2 = 4x + -40

Reorder the terms:
x2 = -40 + 4x

Solving
x2 = -40 + 4x

Solving for variable 'x'.

Reorder the terms:
40 + -4x + x2 = -40 + 4x + 40 + -4x

Reorder the terms:
40 + -4x + x2 = -40 + 40 + 4x + -4x

Combine like terms: -40 + 40 = 0
40 + -4x + x2 = 0 + 4x + -4x
40 + -4x + x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
40 + -4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-40' to each side of the equation.
40 + -4x + -40 + x2 = 0 + -40

Reorder the terms:
40 + -40 + -4x + x2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -4x + x2 = 0 + -40
-4x + x2 = 0 + -40

Combine like terms: 0 + -40 = -40
-4x + x2 = -40

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -40 + 4

Reorder the terms:
4 + -4x + x2 = -40 + 4

Combine like terms: -40 + 4 = -36
4 + -4x + x2 = -36

Factor a perfect square on the left side:
(x + -2)(x + -2) = -36

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 25(x+125-125)=5x | | 3.4-2d=8.2 | | w+x=2y+z | | 9x-5-11x=5(3x-7) | | 4(3x+4)=112 | | 4x+y=217 | | 6s-13=-7 | | 5x-14=108-7 | | 5x-13=108-7 | | 8y-40=-12y | | 5x-12=108-7 | | 5x-15=108-7 | | -3x=13.5 | | 25x+3=2(10x-36) | | 5x-10=108-7 | | 5x-6=108-7 | | 5x-8=108-7 | | -3=-5+x | | 80=10(3y+2) | | 5x-9=108-7 | | 2.1x-1.76=1.68-2.2x | | -5(1+p)-6(p-2)=-4p-6+3-6p | | 17-(4k-2)=2(k+3) | | 3(5-4x)=8x-45 | | 33=y-44 | | -4t-5+5t=7 | | 2X-3(-2x-4)=-5x-9 | | 5x+4=-6 | | b^2+3b-4=0 | | A-4=-17 | | 5m+6+4(3m-5)=5(m+5) | | 9(12+4)(9)=3(6)(9-18) |

Equations solver categories