Question

Me ajudem!! E pra amanhã.

Answer 1

a)

(x + 7) (x + 7)

x² +7x +7x +49

x² + 14x + 49 = 0

196 - 196 = 0

x'= -14 + 0 /2 = -7

x''= -14 - 0/2 = -7

S={-7}