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Alissastefan03
a fost răspuns

Am si eu nevoie de ajutor va rooog
Descompuneti in factori:
X2- x la patrat
(......)2- paranteza la patrat
1) x2-5x
2) x (x+1)-x-1
3) 3x10 ( 3x la puterea 10)+9x8 ( 9z la puterea 8)
4) x2 (x+1)+x(x+1)
5) xy-x-y-1
6) 9xy+3x-3y-1

Răspuns :

1)x^2-5x=x(x-5)
2)x(x+1)-x-1=x(x+1)-(x+1)=(x+1)(x-1)
3)
4)x^2(x+1)+x(x+1)=(x+1)(x^2+1)
5)xy-x-y-1=x(y-1)-y-1=x(y-1)-(y-1)-2=(x-1)(y-1)-2
6)9xy+3x-3y-1=9x(y+3)-3(y+3)+8=(9x-3)(y+3)+8

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