Wykonaj działania :)
a) (3+x)(x-3)(x²+9)
b) 5y²-(y+2)(2-y)*5
c) 3(x²+1)-5(x-2)(x+2)
d)(x+5)(x-5)*14-14x²
Liczę na waszą pomoc, pierwsza osoba dostanie naj.
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a) (3+x)(x-3)(x²+9)=( x²-9)(x²+9) = x^4-81
b) 5y²-(y+2)(2-y)*5= 5y²-(4-y²)*5= 5y²-20-5y²=-20
c) 3(x²+1)-5(x-2)(x+2)=3x²+3-5(x²-4)=3x²+3-5x²+20=23-2x²
d)(x+5)(x-5)*14-14x²=(x²-25)*14-14x²= 14x²-350-14x²=-350