Question

2 grado
x2 + (7 − x)2 = 25

Answer 1

x² + (7 − x)²2 = 25

x² + 49 − 14x + x² = 25

2x² + 49 − 14x = 25

2x² - 14x + 24 = 0  : 2

x² - 7x + 12 = 0

x             -4

x             -3

-4x - 3x = -7x

(x - 4)(x-3) = 0

x - 4 = 0        x - 3 = 0

x = 4              x = 3

CS = (3; 4)

Eternamente axllxa