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13whises
a fost răspuns

Descompuneti in factori:
a) (x+1)(x+3)^2-4(x+1)
b)(x-3)(x+2)^2-x+3
c)(x+7)^2-25
d)(x-6)^2-9x^2
Va rog mult de tot! E urgent! Le.as face dar.....am uitat cum se rezolvau, va rog, imi trebuie pt maine!
REZOLVARI COMPLETE!!!!!!!!!

Răspuns :

Iakabcristina2
a)(x+1)(x²+6x+9-4)=(x+1)(x²+6x+5)=(x+1)(x+5)(x+1)=(x+1)²(x+5)
b)(x-3)(x+2)²-(x-3)=(x-3)(x²+4x+4-1)=(x-3)(x²+4x+3)=(x-3)(x+3)(x+1)
c)(x+7)²-5²=(x+7-5)(x+7+5)=(x+2)(x+12)
d)(x-6)²-9x²=(x-6-3x)(x-6+3x)=(-2x-6)(4x-6)=-4(x+3)(2x-3)