Solve the following equations:
(i) 3 - 4x² = -85
(ii) -5x² = -500
(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}
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