Question

please solve this question

Answer 1

2) x²+9x+18
=x²+3x+6x+18
=x(x+3)+6(x+3)
=(x+3) (x+6)
3) p²-10p+21
=p²-7p-3p+21
=p(p-7) -3(p-7)
=(p-3) (p-7)