What is the best way for solving the problem of class 9th ncert math of Polynomials chapter of class 9th of question no4(1) give me the best and easy way for solving this question in tricky way Expand each of the following, using suitable identities: (i) (x+2y+4z)2
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Expand each of the following, using suitable identities: (i) (x+2y+4z)2 Q.4(1)
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Using identity, (x+y+z)2 = x2+y2+z2+2xy+2yz+2zx
Here, x = x
y = 2y
z = 4z
(x+2y+4z)2 = x2+(2y)2+(4z)2+(2×x×2y)+(2×2y×4z)+(2×4z×x)
= x2+4y2+16z2+4xy+16yz+8xz