04/03/15
1) Desenvolva:
a) (a+5)2=(a+5).(a+5)=a2+5a+5a+25=a2+10a+25
b) (2x+4)2=(2x+4).(2x+4)=4x2+8x+8x+16=4x2+16x+16
c) (x-2b)2=(x-2b).(x-2b)=x2+2bx+2bx+4b2=x2+4bx+4b2
d) (x2+b)2=(x2+b).(x2+b)=x4+x2b+x2b+b2=x4+2x2b+b2
e) (a-3)2=(a-3).(a-3)=a2+3a+3a+9=a2+6a+9
f) (4x-7)2=(4x-7).(4x-7)=16x2+28x+28x+49=312x+49
g) (4x-9)2=(4x-9).(4x-9)=16x2+36x+36x+81=328x+81
Exemplo:
(b+6)2=(b+6).(b+6)=b2+6b+6b+36=b2+12b+36
