Question

ayuda porfavorsito ...

Answer 1

Explicación paso a paso:

9.

P = x (x - 4) + 4x

P = x^2 - 4x + 4x

P = x^2

Q = 7x (x + 5) - 7x^2

Q = 7x^2 + 35x - 7x^2

Q = 35x

P x Q = x^2 x 35x

P x Q = 35x^3

10.

E = 5m (m - 2) - 5m^2

E = 5m^2 - 10m - 5m^2

E = - 10m

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

F = m^2 + 2m - 3

E + F = - 10m + m^2 + 2m - 3

E + F = m^2 - 8m - 3