expand the following using suitable identities expand 3A + 4 b + 5 see the whole square
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(3A +4B +5)²
3A²+4B²+5²+2×3A×4B+2×4B×5+2×5×3A
9A²+16B²+25+24AB+40B+30A
BY USING IDENTITY :
(A+B+C)²= A²+B²+C²+2AB+2BC+2CA
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