Rozwiąż:
(x+7)*(x+2)*(x-2)=
(3-7/10:32/5*3-9/10)1/2=
-7/10, 2/5, -9,10 to są ułamki jako potegowanie
(x+7)*(x+2)*(x-2)=(x+7)*x²-2x+2x-4=(x+7)*(x²-4)=x³-4x+7x²-28
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(x+7)*(x+2)*(x-2)=(x+7)*x²-2x+2x-4=(x+7)*(x²-4)=x³-4x+7x²-28