(u+7)(u-9)=0

Simple and best practice solution for (u+7)(u-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 (u+7)(u-9)=0 equation: 


Simplifying
(u + 7)(u + -9) = 0

Reorder the terms:
(7 + u)(u + -9) = 0

Reorder the terms:
(7 + u)(-9 + u) = 0

Multiply (7 + u) * (-9 + u)
(7(-9 + u) + u(-9 + u)) = 0
((-9 * 7 + u * 7) + u(-9 + u)) = 0
((-63 + 7u) + u(-9 + u)) = 0
(-63 + 7u + (-9 * u + u * u)) = 0
(-63 + 7u + (-9u + u2)) = 0

Combine like terms: 7u + -9u = -2u
(-63 + -2u + u2) = 0

Solving
-63 + -2u + u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-7 + -1u)(9 + -1u) = 0


Subproblem 1
Set the factor '(-7 + -1u)' equal to zero and attempt to solve:

Simplifying
-7 + -1u = 0

Solving
-7 + -1u = 0

Move all terms containing u to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + -1u = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -1u = 0 + 7
-1u = 0 + 7

Combine like terms: 0 + 7 = 7
-1u = 7

Divide each side by '-1'.
u = -7

Simplifying
u = -7

Subproblem 2
Set the factor '(9 + -1u)' equal to zero and attempt to solve:

Simplifying
9 + -1u = 0

Solving
9 + -1u = 0

Move all terms containing u to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + -1u = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1u = 0 + -9
-1u = 0 + -9

Combine like terms: 0 + -9 = -9
-1u = -9

Divide each side by '-1'.
u = 9

Simplifying
u = 9
Solution
u = {-7, 9}

See similar equations:

| -19=(-42)+36+(-12) | | Ax+1=box | | 4x+12=3x+42 | | 3/4÷1230 | | 3/4×60 | | 5p+25=90 | | 3x+2-(4x-1-9xI)=6x-1 | | 2x+2-3x+5=3+2 | | -3q=76 | | .03n=-.18 | | 30-3x=24 | | 50/x=.40 | | kx=1+by | | X=42+2x | | f(x)=5x+-15 | | 3x+5x+3=27 | | .02x-0.5(x-2)=5.32 | | 10x-10=4x+50 | | X-42=2x | | X-33=2(x-4-33) | | x+0.1x=11220 | | (n-2)(n-3)(n-4)(n-5)=360 | | x^2-3x=2x-7 | | x+(x+1)+(x+2)+(x+3)=-72 | | x=7x-9-8x | | 4(v-7)-6v=-16 | | 11=6(-5a-6)-4a | | -4/3÷9/5 | | 5x/X-8 | | 3c^2-c-2=0 | | -2(8)-6y=-8 | | 60x=-0.25 |

Equations solver categories