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Simplifying
(4x)(5x) = 40
Remove parenthesis around (4x)
4x(5x) = 40
Remove parenthesis around (5x)
4x * 5x = 40
Reorder the terms for easier multiplication:
4 * 5x * x = 40
Multiply 4 * 5
20x * x = 40
Multiply x * x
20x2 = 40
Solving
20x2 = 40
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '20'.
x2 = 2
Simplifying
x2 = 2
Take the square root of each side:
x = {-1.414213562, 1.414213562}
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