Expand(2a+b-5c)^2 give me answer
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Answer:4a^2+b^2+25c^2+4ab-10bc-20ac
Step-by-step explanation:
(2a+b-5c)^2
={2a+b+(-5c)}^2
=(2a)^2+b^2+(-5c)^2+{2×2a×b}+{2×b×(-5c)}+{2×(-5c)×2a}
=4a^2+b^2+25c^2+4ab-10bc-20ac
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