Math, asked by rahul761712616, 5 months ago

factorise 25 square - 4 ab square + 28 BC - 42c square. help

Answers

Answered by swapnilsarje17

0

Answer:

25a2−(4b−28bc+42c2) splitting middle term,

=25a2−[4b2−14bc−21bc+42c2]

=25a2−[2b(2b−7c)−7c(2b−6c)]

=25a2−(2b−7c)2=(5a)2−(2b−6c)2

=(5a+2b−7c)(5a−2b+6c

Step-by-step explanation:

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