Question

2. simplify
(7m-8n)power 2+(7m+8n)power2
​

Answer 1

Answer:

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Answer 2

Answer: 98m2 + 128n2

Step-by-step explanation:

(7m - 8n)2 - (7m + 8n)2

(7m - 8n)2 - (7m + 8n)2 =

[(7m)2 - 2(7m)(8n) + (8n)2] + [(7m)2 + 2(7m)(8n) + (8n)2]

= [49m2 - 112mn + 64n2]+ [49m2 + 112mn + 64n2

= (49 + 49)m2 + (112 - 112) mn + (64 + 64)n2

= 98m2 + 0(mn) + 128n2

= 98m2 + 128n2