(2x-7)(9x+7)=0

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Solution for (2x-7)(9x+7)=0 equation: 


Simplifying
(2x + -7)(9x + 7) = 0

Reorder the terms:
(-7 + 2x)(9x + 7) = 0

Reorder the terms:
(-7 + 2x)(7 + 9x) = 0

Multiply (-7 + 2x) * (7 + 9x)
(-7(7 + 9x) + 2x * (7 + 9x)) = 0
((7 * -7 + 9x * -7) + 2x * (7 + 9x)) = 0
((-49 + -63x) + 2x * (7 + 9x)) = 0
(-49 + -63x + (7 * 2x + 9x * 2x)) = 0
(-49 + -63x + (14x + 18x2)) = 0

Combine like terms: -63x + 14x = -49x
(-49 + -49x + 18x2) = 0

Solving
-49 + -49x + 18x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -9x)(7 + -2x) = 0


Subproblem 1
Set the factor '(-7 + -9x)' equal to zero and attempt to solve:

Simplifying
-7 + -9x = 0

Solving
-7 + -9x = 0

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

Add '7' to each side of the equation.
-7 + 7 + -9x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -9x = 0 + 7
-9x = 0 + 7

Combine like terms: 0 + 7 = 7
-9x = 7

Divide each side by '-9'.
x = -0.7777777778

Simplifying
x = -0.7777777778

Subproblem 2
Set the factor '(7 + -2x)' equal to zero and attempt to solve:

Simplifying
7 + -2x = 0

Solving
7 + -2x = 0

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

Add '-7' to each side of the equation.
7 + -7 + -2x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -2x = 0 + -7
-2x = 0 + -7

Combine like terms: 0 + -7 = -7
-2x = -7

Divide each side by '-2'.
x = 3.5

Simplifying
x = 3.5
Solution
x = {-0.7777777778, 3.5}

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