Question

expand each of the following using sutible Identity please answer my question I will make you brainlist​

Answer 1

Answer:

do this question with ( A+B )2.

Answer 2

Answer:

1ans :$4x^{2} +25y^{2} +9z^{2}+20xy+30yz+12xz$

2ans: $4x^{2} +25y^{2} +9z^{2}+20xy-30yz-12xz$

3ans:$4x^{2} +25y^{2} +9z^{2}-20xy+30yz-12xz$

4ans:$4x^{2} +25y^{2} +9z^{2}+20xy+30yz+12xz$

Step-by-step explanation:

$(a+b+c)^{2} =a^{2} +b^{2} +c^{2} +2ab+2bc+2ca\\(-a-b+c)^{2} =a^{2} +b^{2} +c^{2}+2ab-2bc-2ca\\(-a+b+c)^{2} =a^{2} +b^{2} +c^{2}-2ab+2bc-2ca\\(-a-b-c)^{2} =a^{2} +b^{2} +c^{2}+2ab+2bc+2ca$