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Simplifying
3x(3x + x) = 100
Combine like terms: 3x + x = 4x
3x(4x) = 100
Remove parenthesis around (4x)
3x * 4x = 100
Reorder the terms for easier multiplication:
3 * 4x * x = 100
Multiply 3 * 4
12x * x = 100
Multiply x * x
12x2 = 100
Solving
12x2 = 100
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '12'.
x2 = 8.333333333
Simplifying
x2 = 8.333333333
Take the square root of each side:
x = {-2.886751346, 2.886751346}
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