Math, asked by robot5927, 7 months ago

please answer the questions

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Answered by BARATHSHIVAM

0

Step-by-step explanation:

(7a+8b)(7c-8d)=(7a-8b)(7c+8d)

To p.t a:b=c:d

49ac-56ad+56bc-64bd=49ac+56ad-56bc-64bd

-56ad-56ad+56bc+56bc=49ac-49ac-64bd+64bd

-112ad+112bc=0

112(bc-ad)=0

bc=ad

a/b=c/d

a:b=c:d hence proved

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