(x)^2+(21)^2=(29)^2

解

(x)^{2} + (21)^{2} = (29)^{2}

x = 20, x = - 20

解答ステップ

x^{2} + (21)^{2} = (29)^{2}

拡張

x^{2} + 2 1^{2} : x^{2} + 441

拡張

2 9^{2} : 841

x^{2} + 441 = 841

441

を右側に移動します

x^{2} = 400

x^{2} = f (a)

の場合, 解は

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

x = 400, x = - 400

400 = 20

- 400 = - 20

x = 20, x = - 20