Question

Rezolvati va rog ex 4

Answer 1

a) x^2+5x+7x+35=
x(x+5)+7(x+5)=(x+5)(x+7)
b)x^2+7x+10x+70=
x(x+7)+10(x+7)=(x+7)(x+10)
c)x^2+8x+7x+56=
x(x+8)+7(x+8)=(x+8)(x+7)
d)x^2-5x-4x+20=
x(x-5)-4(x-5)=(x-5)(x-4)
e)x^2-5x-9x+45=
x(x-5)-9(x-5)=(x-5)(x-9)
f)x^2-6x-7x+42=
x(x-6)-7(x-6)=(x-6)(x-7)
g)x^2-11x+2x-22=
x(x-11)+2(x-11)=(x-11)(x+2)
h)x^2-20x+5x-100=
x(x-20)+5(x-20)=(x-20)(x+5)
i)x^2-25x+2x-50=
x(x-25)+2(x-25)=(x-25)(x+2)
j)x^2+13x-2x-26=
x(x+13)-2(x+13)=(x+13)(x-2)
k)x^2-4x+20x-80=
x(x-4)+20(x-4)=(x-4)(x+20)
l)x^2-x+20x-20=
x(x-1)+20(x-1)=(x-1)(x+20)