Question

X-(y-z)-(3z+2y-2x)-(x-y+2z)

Answer 1

Step-by-step explanation:

$x - y - z - 3z - 2y + 2x - x + y - 2z \\ 2x - 2y - 6z \\ 2(x - y - 3z)$

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Answer 2

Answer:

Step-by-step explanation:

(x+y−2z)

2

=x

2

+y

2

+4z

2

+2xy−4yz−4zx

⇒(x+y−2z)

2

−x

2

−y

2

−3z

2

+4xy

=x

2

+y

2

+4z

2

+2xy−4yz−4zx−x

2

−y

2

−3z

2

+4xy

=z

2

+6xy−4yz−4zx