Please give thaw answer of question 4
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Take first two terms as a and last term as b and use (a-b)^2 or (a+b)^2 formula
Step-by-step explanation:
(x+2y+4z)^2
= (x+2y)^2 +2*(x+2y)*4z+ (4z)^2
= (x^2 +2*x*2y+4y^2) +8xz+ 16yz +16z^2
= x^2 + 4xy + 4y^2 +8xz+ 16yz +16z^2
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