Question

What is the co-efficient of ab in the equation ormula1" title="(2a - 5b) ^{2} " alt="(2a - 5b) ^{2} " align="absmiddle" class="latex-formula">

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Answer 1

Answer:

ans:-20

or, (2a-5b)^2

or, 4a^2 -2*2a*5b+25b^2

or, 4a^2-20ab+25b^2