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Simplifying 4x(x) = 90 Multiply x * x 4x2 = 90 Solving 4x2 = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '4'. x2 = 22.5 Simplifying x2 = 22.5 Take the square root of each side: x = {-4.74341649, 4.74341649}
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