Answer :
Solution:
[tex]x^2(a+b)+5x(a+b)+6(a+b)\\\\=(a+b)(x^2+5x+6)\\\\=(a+b)\{x^2+(3+2)x+6\}\\\\=(a+b)\{x^2+3x+2x+6\}\\\\=(a+b)\{x(x+3)+2(x+3)\}\\\\=(a+b)(x+3)(x+2)[/tex]
x²(a+b) + 5x(a+b) +6(a+b)
= (a+b)(x²+ 5x +6)
=(a+b)(x²+3x+2x+6)
=(a+b){x(x+3)+2(x+3)}
=(a+b)(x+3)(x+2)