Hi allin Q 1 27 y^3 is wrongin Q 2,(7A)^2 + (2b)^2 + (3c)^2 - 2 (7a)(2b) + 2 (2b)(3c) - 2 (7a)(3c)this is nothing but (-a+b+c)^2☆(-7a+2b+3c)^2 hope it helps mark as brainliest
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