Răspuns:
Ex 8:
a) = x²-1² = x²-1
b) = x²-2² = x²-4
c) = x²-3² = x²-9
d) = x²-5² = x²-25
Ex:9
a) = (2x)²-2•2x•1+1² = 4x²-4x+1
b) = (2x)²+2•2x•3+3² = 4x²+12x+9
c) = (4x)²+2•4x•1+1² = 16x²+8x+1
d) = (2x)²-1² = 4x²-1
e) = (3x)²-2² = 9x²-4
f) = x²-2x√3+√3² = x²-2√3x+3
g) = (√2x-1)² = 2x²-2√2x+1
h) = (2x)²+2•2x√2+√2² = 4x²+4√2x+2
Atentie! a nu se confunda litera x cu semnul inmultirii
EVERGREEN
