Question

Va rog sa calculati corect si sa nu puneti direct rezultatul... adica pas cu pas
a) (x²+3) (x²-9)-x²·(x+1)²+2x(x-2)²=
b) (x+2)(x+1)²-x(x-5)(x+5)+(x-2)²=
c) (2x+1)²-3(x+3)(x-2)+(x+1)(x-8)=
d)(5x-8)·[2(x+1)-2(x+6)]-(2x-1)[5(x+2)·3(x+3)=

Answer 1

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