add 2a-3b-5 a square b and -3a+3b+4a
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Answer:
LHS = (2a+3b)2+(1a−3b)2
=(2a)2+2×2a×3b+(3b)2+(2a)2−2×2a×3b+(3b)2
=4a2+12ab+9b2+4a2−12ab+9b2
=8a2+18b2=RHS
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