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

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


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

Reorder the terms:
4x(-7 + x) + 9(x + -7)(x + -7) = 0
(-7 * 4x + x * 4x) + 9(x + -7)(x + -7) = 0
(-28x + 4x2) + 9(x + -7)(x + -7) = 0

Reorder the terms:
-28x + 4x2 + 9(-7 + x)(x + -7) = 0

Reorder the terms:
-28x + 4x2 + 9(-7 + x)(-7 + x) = 0

Multiply (-7 + x) * (-7 + x)
-28x + 4x2 + 9(-7(-7 + x) + x(-7 + x)) = 0
-28x + 4x2 + 9((-7 * -7 + x * -7) + x(-7 + x)) = 0
-28x + 4x2 + 9((49 + -7x) + x(-7 + x)) = 0
-28x + 4x2 + 9(49 + -7x + (-7 * x + x * x)) = 0
-28x + 4x2 + 9(49 + -7x + (-7x + x2)) = 0

Combine like terms: -7x + -7x = -14x
-28x + 4x2 + 9(49 + -14x + x2) = 0
-28x + 4x2 + (49 * 9 + -14x * 9 + x2 * 9) = 0
-28x + 4x2 + (441 + -126x + 9x2) = 0

Reorder the terms:
441 + -28x + -126x + 4x2 + 9x2 = 0

Combine like terms: -28x + -126x = -154x
441 + -154x + 4x2 + 9x2 = 0

Combine like terms: 4x2 + 9x2 = 13x2
441 + -154x + 13x2 = 0

Solving
441 + -154x + 13x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(63 + -13x)(7 + -1x) = 0

Subproblem 1

Set the factor '(63 + -13x)' equal to zero and attempt to solve: Simplifying 63 + -13x = 0 Solving 63 + -13x = 0 Move all terms containing x to the left, all other terms to the right. Add '-63' to each side of the equation. 63 + -63 + -13x = 0 + -63 Combine like terms: 63 + -63 = 0 0 + -13x = 0 + -63 -13x = 0 + -63 Combine like terms: 0 + -63 = -63 -13x = -63 Divide each side by '-13'. x = 4.846153846 Simplifying x = 4.846153846

Subproblem 2

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 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 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Solution

x = {4.846153846, 7}

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