Question

(7m-8n) square + (7m+8n) square.
Answers

Answer 1

Answer:

49m⁴-64n⁴ Ans.

Step-by-step explanation:

(7m-8n)²+(7m+8n)

[(7m-8n)+(7m+8n)]²

[7m(7m+8n)-8n(7m+8n)]²

[49m²+56mn-56mn-64n²]²

[49m²-64n²]²

49m⁴-64n⁴

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