Question

what is the answer guys​

Answer 1

Q1. the identity is (x+a)(x+b)=x²+x(a+b)+ab

by using this formula u will get the answer

Q2.the identity used for this is (a+b)³=a³+b³+3ab(a+b)

by using this u will get the answer

Q3.the identity is (a+b+c)²=a²+b²+c²+2ab+2bc+2ac

so by this you will get the solution

Q4.a)(40+3)² , here the identity (a+b)²=a²+2ab+b² is used

b)(400-5)² , (a-b)²=a²-2ab+b²

Q5. (I'm not sure about this answer)

Q6. here (a+b+c)² is used on the LHS as well as on the RHS (you should be careful with the signs)

Step-by-step explanation:

Hope it helped you