Question

expand the following using a suitable identity: (a) (1+a+b)^3​

Answer 1

By using identity $\fcolorbox{red}{yellow}{(a+b+c)²\:=\:a²+b²+c²+2ab+2bc+2ac}$

(1 + A + B)²

• 1² + A² + B² + 2A + 2AB + 2B
• 2 + A² + B² + 2A + 2AB + 2B

$<marquee behaviour-move> <font colour ="red">please mark as brainliest........$