2x^2-8x=x^2+9

Simple and best practice solution for 2x^2-8x=x^2+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^2-8x=x^2+9 equation:


Simplifying
2x2 + -8x = x2 + 9

Reorder the terms:
-8x + 2x2 = x2 + 9

Reorder the terms:
-8x + 2x2 = 9 + x2

Solving
-8x + 2x2 = 9 + x2

Solving for variable 'x'.

Reorder the terms:
-9 + -8x + 2x2 + -1x2 = 9 + x2 + -9 + -1x2

Combine like terms: 2x2 + -1x2 = 1x2
-9 + -8x + 1x2 = 9 + x2 + -9 + -1x2

Reorder the terms:
-9 + -8x + 1x2 = 9 + -9 + x2 + -1x2

Combine like terms: 9 + -9 = 0
-9 + -8x + 1x2 = 0 + x2 + -1x2
-9 + -8x + 1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-9 + -8x + 1x2 = 0

Factor a trinomial.
(-1 + -1x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {-1, 9}

See similar equations:

| Log(9x+11)=3 | | -3(5s-6)-18=-3(7s+6)-4 | | -(z+9)+(4z+1)=-2(z+1) | | y=2.3x+4 | | 75x^3=12x | | x-43=-48 | | a^2+56-15a=0 | | 8*x=25*3 | | -0.8(-2.21+5x)=-3.7x | | log(x+5)-log(x-2)=1 | | y=576 | | 27-4u=5u | | 5(4z-1)-5(z+9)=9(z+1) | | 210(x+6)=11-(x+2) | | F(x)=x^3-3x^2-10x | | x^2+87-19x+3=0 | | 4u+2u-18=-72 | | x+2=3(4x-2) | | -5p+10=-3p | | 8z+4=9z+9 | | 41-x+10-7=0 | | -1+4k=-10+5k | | 36x^2+49x=0 | | Y=tan(9x) | | 2x^2-9x=222 | | ln(x)+ln(x+5)=ln(x+1)+ln(x+3) | | 2x+(-4x)=-106 | | lnx=4ln | | 5m^2+0x-24=0 | | -3=-5(2)+b | | 5m^2-14=10 | | 20=(4)(5)+b |

Equations solver categories