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Simplifying
324 = x(4x)
Remove parenthesis around (4x)
324 = x * 4x
Reorder the terms for easier multiplication:
324 = 4x * x
Multiply x * x
324 = 4x2
Solving
324 = 4x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4x2' to each side of the equation.
324 + -4x2 = 4x2 + -4x2
Combine like terms: 4x2 + -4x2 = 0
324 + -4x2 = 0
Add '-324' to each side of the equation.
324 + -324 + -4x2 = 0 + -324
Combine like terms: 324 + -324 = 0
0 + -4x2 = 0 + -324
-4x2 = 0 + -324
Combine like terms: 0 + -324 = -324
-4x2 = -324
Divide each side by '-4'.
x2 = 81
Simplifying
x2 = 81
Take the square root of each side:
x = {-9, 9}
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