Solve the following equations: (i) 3 - 4x² = -85 (ii) -5x² = -500 3 - 4x² = -85 -4x² = -88 {subtracted 3 from both sides} x² = 22 {divided both sides by -4} x = ±√22 {took square root of both sides} -5x² = -500 x² = 100 {divided both sides by -5} x = ±10 {took square root of both sides} © Algebra House
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