Question

exercicios calcule os produtos
B)
(a-2).(a-7)=
c)
(y-6).(y+6)=
d)
(2x-5).(3x-2)=
e)
(1-2x).(4+3x)=
f)
(-x+4).(x+5)=

Answer 1

B)

a²-7a-2a+14=a²-9a+14

C)
y²+6y-6y-36

ou simplesmente,

y²-(6²)=y²-36


D)

6x²-4x-15x+10=6x²-19x+10

E)

4+3x-8x-6x²=-6x²-5x+4

F)

-x²-5x+4x+20=-x²-x+20