👤
a fost răspuns

Descompuneti in factori:
a) x²+6x+8
b)x²-8x-9
c)x²-15x+56
d)x²-10x+9
e)x²-14x+24

Răspuns :

x²+6x+8=x^2+2x+4x+8=x(x+2)+4(x+2)=(x+2)(x+4)

x²-8x-9=x^2 +x-9x-9=x(x+1)-9(x+1)=(x+1)(x-9)

x²-15x+56=x^2 -7x-8x+56=x(x-7)-8(x-7)=(x-7)(x-8)

x²-10x+9=x^2-x-9x+9=x(x-1)-9(x-1)=(x-1)(x-9)

x²-14x+24=x^2-2x-12x+24=x(x-2)-12(x-2)=(x-2)(x-12)

Alte intrebari