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3z2 - 18 = -18 z = ±1 z = ±√12 z = 0 no solution 4g2 + 10 = 11 g = 0 g = ±1 g = ±¼ g = ±½ 2m2 - 42 = 8 m = ±√17 m = ±√34 m = ±5 no solution 5n2 - 17 = -19 n = ±√2.5 n = 0 n = ±2 no solution -21 = 15 - 2z2 z = ±3 z = ±√3 z = ±√18 no solution 42 = 3(x2 + 5) x = 9, -9 x = 3, -3 x = 37/3, -37/3 no solution 11x2 + 3 = 5(4x2 - 3) x = 2, -2 x = 0 x = √2, -√2 no solution 20 = 2(m+5)2 m = 5, 15 m = 0 m ≈ -1.84, -8.16 no solution 6(x+4)2 = 18 x = 2.27, -5,73 x = -2.27, -5.73 x = 2.35, 5.45 x = -2.35, -5.45 what is the mistake? no solution need ± added wrong didn't divide by 2 -16t2 = 0 -16t2 - 68 = 0 -16t2 + 68 = 0 -16t2 = 68 |