(x-9)(2x+9)=0

Simple and best practice solution for (x-9)(2x+9)=0 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-9)(2x+9)=0 equation:


Simplifying
(x + -9)(2x + 9) = 0

Reorder the terms:
(-9 + x)(2x + 9) = 0

Reorder the terms:
(-9 + x)(9 + 2x) = 0

Multiply (-9 + x) * (9 + 2x)
(-9(9 + 2x) + x(9 + 2x)) = 0
((9 * -9 + 2x * -9) + x(9 + 2x)) = 0
((-81 + -18x) + x(9 + 2x)) = 0
(-81 + -18x + (9 * x + 2x * x)) = 0
(-81 + -18x + (9x + 2x2)) = 0

Combine like terms: -18x + 9x = -9x
(-81 + -9x + 2x2) = 0

Solving
-81 + -9x + 2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-9 + -2x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-9 + -2x)' equal to zero and attempt to solve: Simplifying -9 + -2x = 0 Solving -9 + -2x = 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 + -2x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -2x = 0 + 9 -2x = 0 + 9 Combine like terms: 0 + 9 = 9 -2x = 9 Divide each side by '-2'. x = -4.5 Simplifying x = -4.5

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 = {-4.5, 9}

See similar equations:

| (6x-13)(7x+11)=0 | | y=29+17x | | 17x=-29u | | -29y=17x | | .6t-11=64-4.3 | | 3m-4=26 | | 2p-8=11 | | 3x-10=3(x-4)+2 | | (7x-13)+(4x+15)=90 | | (4x+3)+(5x+6)=180 | | 9(3x+9)=14-(x+3) | | (2x+3)+(2x+21)=180 | | (4x+3)+(2x+21)=90 | | 188.76+14.31-106.5= | | p^2-10p+24= | | 9x-6y=3 | | (2x+5)(3x-1)=0 | | (x-5)(3x+5)=0 | | 2(4y-3)=3(2y+4) | | (4x-7)(3x+11)=0 | | 12x^2-36x=0 | | 0.5(2x+8)=x-4 | | (2+4)*5+19-17+7+5*(7+1*3)+6= | | 6h-8=2(2h+1) | | 10-10x=50-24x | | 2+14=6-4 | | x^3-4x^2-5x+20= | | y=2x^3-7x^2-9x | | 96-3x=3x+18 | | 11x^2=55x | | 5x-4(2x+1)= | | 5(k+3)=2k-6 |

Equations solver categories