Question

Q-4:simplify.
1.(a²-b²)²
2.(2x+5)²-(2x_5)²
3.(7m-8n)²+(7m+8n)²
4.(4m+5n)²+(5m+4n)²
5.(2.5p-1.5q)²-(1.5p-2.5q)²
6.(ab+bc)²-2ab²c
7.(m²-n²m)²+2m³n²
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Answer 1

Answer:

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