Question

9. Calcula P . Q si:

P = x(x - 4) + 4x

Q = 7x(x + 5) - 7x


10. Calcula E + F si:

E = 5m( m - 2) - 5m al cuadrado

F = (m - 1) ( m + 3)

Answer 1

Explicación paso a paso:

p•q= (x2-4×+3×)(7×2+35×-7×)

= (x2-x)(7x2+28x)

= x4+28x3-7x3-28x2

= x4+21x3-28×2

E+F= 5m2-10m+ m2+3m-m-3

= 6m2-8m-3