Question

what identity should we use??

Answer 1

(x+a)*(x+b)=x^2 + (a+b)x + ab

Answer 2

$\huge\mathcal\red{Salut\:Mate}$

Here is your required answer ⤵️

$the \: identity \: that \: you \: should \: use \: in \: above \: question \: is \: {x}^{2} + (a + b)x + ab$

Gracais Mate ✌️

$<marquee>❣️ Hope it may helps u...☺️❣️$