Question

Ma ajudem a resolver esta questão

Answer 1

X=8-2y y2-4×(8-2y)=-12

X=8 -2×2 y2-32+8y=-12

X=6×2 y2+8y=-12+32

X=12 2y+8y=20

10y=20

y=20÷10

LETRA (A) y=2