Question

expand the following by using suitable identities (x+2y+4z)hole square

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Answer 1

Step-by-step explanation:

(x+2y+4z)

using identity.,

(a+b+c )² =a²+b²+c²+2ab + 2bc + 2ca

here , a= x , b= 2y and c = 4z

( x+ 2y+ 4z ) ²

=x² + (2y )²+

(4z) ²² + ( 2×x× 2y) + ( 2×2y × 4z ) + ( 2×4z ×x )

= x² +

4y² + 16z² + 4xy + 16 yz + 8xz