Q2. The value of (3a + 7b)² – ( 3a – 7b)² is hu​

Question

Q2. The value of (3a + 7b)² – ( 3a – 7b)² is hu​

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Luna 1 month 2021-08-13T03:06:02+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-13T03:07:16+00:00

    Answer:

    Identity is (a^2+b^2+c^2+2ab+2bc+2ca

    now expand it by putting a=3a,b=(-7b),c=(-c)

    substitute the value and you will get the answer

    =9a^2+49b^2+c^2-42ab+14bc-6ca

    0
    2021-08-13T03:07:47+00:00

    Step-by-step explanation:

    9a²+49b²+42ab-(9a²+49b²-42ab)

    42ab+42ab

    84ab is the answer of this question

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