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Calculati:
x² -7x +5-(x+8) (x-1)


Răspuns :

x la a 2 - 7x+5-(x la a 2+8x-x-8)=x la a 2-7x+5-x la a 2 -8x+x+8=-14x+13
x²-7x+5-(x²+7x-8)=
-14x+5+8=
-14x+13