Question

(3x+5)²- (x+1)²
Urgent

Answer 1

Răspuns:

(3x+5)^2-(x+1)^2

=[3x+5-(x+1)]•[3x+5+(x+1)]

=(3x+5-x-1)•(3x+5+x+1)

=(2x+4)•(4x+6)

=2(x+2)•2(2x+3)

=2×2(x+2)•(2x+3)

=4(x+2)•(2x+3)

Explicație pas cu pas:

Folosim formula:a^2-b^2=(a-b)(a+b)