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a fost răspuns

Calculati:

a) (2x + 1 ) (3x +1 )=

b) (1 - x la 2 ) (2 +x )=

Răspuns :

0000000
(2x+1)(3x+1)=6x²+2x+3x+1
                   =6x²+5x+1

(1-x²)(2+x)=2-x-2·x²-x³
Adriana97
6x la put 2+2x+3x+1=6xla put 2+5x+1
2+x-2x la 2-xla3=-x la 3-2x la 2+x+2

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