Question

**URGENTE**
Determine os seguintes produtos:
a) (x + 1) . (x - 8) =
b) (3x + y) . (3x - 2y) =
c) (5x - 10) - (x - 2) =
d)(a + b) . (a - b) =
e) (x - a) . (3x + 2a) =
f) (3a - b) · (-2a + 5b) =​

Answer 1

Resposta:

a) x²-8x+1x-8

= x²-7x-8

b) 9x²-6xy+3xy-2y²

= 9x²-2y²-3xy

c) 5x²-10x-10x+20

= 5x²-20x+20

d) a²-ab+ab-b²

= a²-b²

e) 3x²+2ax-3ax-2a²

=3x²-2a²-ax

f) -6a²+15ab+2ab-5b²

= -6a²-5b²+17ab