Question

ajutor...Descompuneti ​

Answer 1

Răspuns:

Explicație pas cu pas:

x²-3x-4=x²-4x+x-4=(x-4)(x+1)

x²-6x-7=x²-7x+x-7=(x-7)(x+1)

x²+x-2=x²+2x-x-2= (x+2)(x-1)

x²+4x-5=x²+5x-x-5=(x+5)(x-1)

x²-8x-20=x²-10x+2x-20=(x-10)(x+2)

x²-x-6=x²-3x+2x-6=(x-3)(x+2)

Answer 2

Răspuns:$x2+4x-5=x2-1+4x-4=(x2-1)+4(x-1)=(x-1)(x+1)+4(x-1)=(x-1)(x+1+4)=(x-1)(x+5)$

Explicație pas cu pas:

a)x^2-3x-4=x^2-1-3x-3=(x^2-1)-3(x+1)=(x-1)(x+1)-3(x+1)=(x+1)(x-1-3)=(x+1)(x-4)

d)x^2-6x-7=x^2-1-6x-6=(x^2-1)-6(x+1)=(x+1)(x-1)-6(x+1)=(x+1)(x-1-6)=(x+1)(x