Răspuns:
a)(x-4)(x+1)
b)(x+5)(x-1)
c)(x+3)(x-1)
d)(x-7)(x+1)
e)(x-10)(x+2)
f)(x-2)(x+9)
g)(x+2)(x-1)
h)(x-3)(x+2)
i)(x+1)(x-2)
Explicație pas cu pas:
a)x^2-3x-4=
x^2+x-4x-4=
x(x+1)-4(x+1)= (x-4)(x+1)
