1.

36*z**2 %2B 49*y**2 %2B 84*(y*z)

Answer»

49y^2 + 84yz + 36z^2 = (7y)^2 + 2 × (7y) × (6z) + (6z)^2

= (7y + 6z)2

[(a + b)2 = a2 + 2ab + b2]



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