Question

a) x^2 - 7x + 11
b) x^2 + 11x + 28
c) x^2 + 28x + 11
d) x^2 + 4x + 11

Answer 1

Resposta:

item b) x² +11x +28

Explicação passo-a-passo:

(4+ x ) . (7 +x)=

4.7 +4.x + x.7 +x.x=

28 +4x +7x +x²=

x² + 11x +28