Question

using formula solve: (x-2y-z)^2​

Answer 1

I hope it is helpful for you

Answer 2

$(x-2y-z)^2=x^2+4y^2+z^2-2xz+4yz-2xz$

Step-by-step explanation:

Given : Expression $(x-2y-z)^2$

To find : Solve using formula ?

Solution :

Using formula,

$(a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ac$

Substitute a=x, b=-2y and c=-z,

$(x-2y-z)^2=x^2+(-2y)^2+(-z)^2+2(x)(-z)+2(-2y)(-z)+2(-z)(x)$

$(x-2y-z)^2=x^2+4y^2+z^2-2xz+4yz-2xz$

Therefore, the simplification is $(x-2y-z)^2=x^2+4y^2+z^2-2xz+4yz-2xz$

#Learn more

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