(4x-7)(x+9)=0

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Solution for (4x-7)(x+9)=0 equation: 


Simplifying
(4x + -7)(x + 9) = 0

Reorder the terms:
(-7 + 4x)(x + 9) = 0

Reorder the terms:
(-7 + 4x)(9 + x) = 0

Multiply (-7 + 4x) * (9 + x)
(-7(9 + x) + 4x * (9 + x)) = 0
((9 * -7 + x * -7) + 4x * (9 + x)) = 0
((-63 + -7x) + 4x * (9 + x)) = 0
(-63 + -7x + (9 * 4x + x * 4x)) = 0
(-63 + -7x + (36x + 4x2)) = 0

Combine like terms: -7x + 36x = 29x
(-63 + 29x + 4x2) = 0

Solving
-63 + 29x + 4x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-9 + -1x)(7 + -4x) = 0


Subproblem 1
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

Subproblem 2
Set the factor '(7 + -4x)' equal to zero and attempt to solve:

Simplifying
7 + -4x = 0

Solving
7 + -4x = 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 + -4x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -4x = 0 + -7
-4x = 0 + -7

Combine like terms: 0 + -7 = -7
-4x = -7

Divide each side by '-4'.
x = 1.75

Simplifying
x = 1.75
Solution
x = {-9, 1.75}

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