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Simplifying
3x(x + 2x) = 4x2
Combine like terms: x + 2x = 3x
3x(3x) = 4x2
Remove parenthesis around (3x)
3x * 3x = 4x2
Reorder the terms for easier multiplication:
3 * 3x * x = 4x2
Multiply 3 * 3
9x * x = 4x2
Multiply x * x
9x2 = 4x2
Solving
9x2 = 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.
9x2 + -4x2 = 4x2 + -4x2
Combine like terms: 9x2 + -4x2 = 5x2
5x2 = 4x2 + -4x2
Combine like terms: 4x2 + -4x2 = 0
5x2 = 0
Divide each side by '5'.
x2 = 0
Simplifying
x2 = 0
Take the square root of each side:
x = {0}
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