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Renatemambouko te rog ajuta-ma!MFM te rog ajuta-ma!

Renatemambouko Te Rog AjutamaMFM Te Rog Ajutama class=

Răspuns :

a). 9+15z^2+25z^4=(3+5z^2)^2. / b). (y-3)^3+(y+1)^3=(y-3+y+1)(y^2-6y+9-y²+2y+3+y²+y+1)=(2y-2)(y²-3y+13). / c). 16+(x-1)²=(x+2)² / 16+x²-2x+1=x²+4x+4. / 6x=13 / x=13/2. / d). 4^n-2^2n+1+1. / (2^n)²-2*2^n+1=(2^n+1)²