Question

Expand the following using suitable identity (2x - y + z) 2​

Answer 1

Answer:

Given (2x – y + z)2

Using identity,

(x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx

Here,

x = 2x

y = −y

z = z

(2x – y + z)2 = (2x)2 + (-y)2 + z2 + (2 × 2x × -y) + (2× -y × z) + (2 × z × 2x)

(2x – y + z)2 = 4x2 + y2 + z2 – 4xy – 2yz + 4xz

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Answer 2

Answer:

4x-2y+2z

Step-by-step explanation:

= 2(2x-y+z)

= 2 * 2x +2 * (-y) +2 * z

= 4x -2y +2z