Question

Calcule os produtos:
a.(x – 5)(x – 3)
b.(x – 5)(x – 2)
c.(x – 5)(x + 2)
d.(x – 3)(x + 2)
e.(x + 3)(x + 7)

Answer 1

Resposta:

a) x^2-3x-5x+15=

= x^2-7x+15

b) x^2-2x-5x+10=

=x^2-7x+10

c) x^2+2x-5x-10=

=x^2-3x-10

d) x^2+2x-3x-6=

=x^2-x-6

e)x^2+7x+3x+21=

=x^2+10x+21