34x+78=x^2+34x-43

解

34 x + 78 = x^{2} + 34 x - 43

x = 11, x = - 11

解答ステップ

34 x + 78 = x^{2} + 34 x - 43

辺を交換する

x^{2} + 34 x - 43 = 34 x + 78

43

を右側に移動します

x^{2} + 34 x = 34 x + 121

34 x

を左側に移動します

x^{2} = 121

x^{2} = f (a)

の場合, 解は

x = f (a), - f (a)

x = 121, x = - 121

121 = 11

- 121 = - 11

x = 11, x = - 11