Question

Sub: Math
1. Evaluate :-(6-xy) (6+xy)
2. Expand :- (a-b+c)2
B. Find the sqare of :- 2x-5y
4. Expand :- (2a+b)3
5. Find the cube of 3b - 2a
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Answer 1

Answer:

1.(6-xy)(6+xy)

=6²-(xy)²

=36-x²y²

2.(a-b+c)²

=a²+(-b)²+c²+2a(-b)+2(-b)a+2ca

3.(2x-5y)

=(2x)²-2(2x)(5y)+(5y)²

=4x²-20xy+25y²