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Simplifying 4x^{2}+ -10 = 90 Reorder the terms: -10 + 4x^{2}= 90 Solving -10 + 4x^{2}= 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + 4x^{2}= 90 + 10 Combine like terms: -10 + 10 = 0 0 + 4x^{2}= 90 + 10 4x^{2}= 90 + 10 Combine like terms: 90 + 10 = 100 4x^{2}= 100 Divide each side by '4'. x^{2}= 25 Simplifying x^{2}= 25 Take the square root of each side: x = {-5, 5}

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