Question

x²+ 7 x =18 por factorizacion

Answer 1

x²+ 7 x = 18

x²+ 7 x - 18 = 0

x           + 9

x           - 2

9x - 2x = 7x

(x + 9)(x - 2) = 0

x + 9 = 0     x - 2 = 0

x = -9        x = 2

CS = (-9: 2)

        Eternamente

☆꧁☆༒ axllxa  ༒☆꧂☆