16(a+6b)^2-9(a-3b)^2
Answers
Answered by
3
Answer:8a^2+246ab+495b^2
Step-by-step explanation:
16(a+6b)^2-9(a-3b)^2
=16{a^2+12ab+36b^2}-9{a^2-6ab+9b^2}
=16a^2+192ab+576b^2-9a^2+54ab-81b^2
=a^2(16-9)+ab(192+54)+b^2(576-81)
=8a^2+246ab+495b^2
Answered by
0
Answer:
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Step-by-step explanation:
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