Пошаговое объяснение:
1. n×n-39=35×9
n^2 = 315 + 39
n^2 = 354
n1 = -V(354)
n2 = V(354)
2. x×x-24=5×8
x^2 = 40 + 24
x^2 = 64
X1 = -8
X2 = 8
3. 279+y×y=35×9
y^2 = 315 - 279
y^2 = 36
Y1 = -6
Y2 = 6
