Solving Quadratics (b=0) Practice

3z^{2} - 18 = -18z = ±1 z = ±√12 z = 0 no solution 4g ^{2} + 10 = 11g = 0 g = ±1 g = ±¼ g = ±½ 2m^{2} - 42 = 8m = ±√17 m = ±√34 m = ±5 no solution 5n^{2} - 17 = -19n = ±√2.5 n = 0 n = ±2 no solution -21 = 15 - 2z ^{2}z = ±3 z = ±√3 z = ±√18 no solution 42 = 3(x ^{2} + 5)x = 9, -9 x = 3, -3 x = 37/3, -37/3 no solution 11x - 3)^{2} + 3 = 5(4x^{2}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} = 18x = 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 -16t ^{2} = 0-16t ^{2 }- 68 = 0-16t ^{2} + 68 = 0-16t ^{2} = 68 |

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