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Simplifying
4x + x(5 + -1x) + -9x = 0
4x + (5 * x + -1x * x) + -9x = 0
4x + (5x + -1x2) + -9x = 0
Reorder the terms:
4x + 5x + -9x + -1x2 = 0
Combine like terms: 4x + 5x = 9x
9x + -9x + -1x2 = 0
Combine like terms: 9x + -9x = 0
0 + -1x2 = 0
-1x2 = 0
Solving
-1x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '-1'.
x2 = 0
Simplifying
x2 = 0
Take the square root of each side:
x = {0}
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