Question

x^2-9x+20=0 fórmula general​

Answer 1

x² - 9x + 20 = 0

x            - 4

x            - 5

-4x - 5x = - 9x

(x -4)(x - 5) = 0

x - 4 = 0      x - 5 = 0

x = 4            x  =  5

CS = (4; 5)

Eternamente axllxa