Question

Va rog mult sa ma ajutati.

Answer 1

a) xpătrat+3x+2=xpătrat+x+2x+2=(xpătrat+x)+(2x+2)=x*(x+1)+2*(x+1)=(x+1)*(x+2)
b) xpătrat+5x+6=xpătrat +2x+3x+6=(xpătrat+3x)+(2x+6)=x*(x+3)+2*(x+3)=(x+3)*(x+2)
c) xpătrat+4x+3=xpătrat+x+3x+3=(xpătrat+x)+(3x+3)=x*(x+1)+3*(x+1)=(x+1)*(x+3)

Answer 2

x^2 = x la puterea a 2-a
a) x^2+3x+2= x^2+2x+x+2=x(x+2)+(x+2)=(x+2)(x+1)
b) x^2+5x+6=x^2+2x+3x+6=x(x+2)+3(x+2)=(x+2)(x+3)
c) x^2+4x+3=x^2+3x+x+3=x(x+3)+(x+3)=(x+3)(x+1)
d) x^2+6x+8=x^2+4x+2x+8=x(x+4)+2(x+4)=(x+4)(x+2)
e) x^2+8x+15=x^2+5x+3x+15=x(x+5)+3(x+5)=(x+3)(x+5)
f) x^2+7x+6=x^2+6x+x+6=x(x+6)+(x+6)=(x+6)(x+1)
g)x^2+10x+21=x^2+7x+3x+21=x(x+7)+3(x+7)=(x+7)(x+3)
h) x^2+9x+20=x^2+5x+4x+20=x(x+5)+4(x+5)=(x+4)(x+5)