Question

(2x-4y-z) whole square

Answer 1

(2x - 4y - z)²

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As we know that

(a+b+c)² = a² +b² + c² +2 ( ab + bc + ac)

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(2x)² +(-4y)²+ (-z)² +2[2x(-4 y) + (-4y)(-z)+ (-z)(2x)]

4x² +16y² +z² +2 ( -8 xy+4yz -2x z )

4x² + 16y² + z² -16xy +8yz -4xz

Hope it helps