Question

If x , y, z are in A.P, then

−

−

is equal to​

Answer 1

Answer:

If x,y and z are in AP, then 2y=x+z

Substituting x as 2y−z in the above expression, we get

(x+y−z)(y+z−x)

=(2y−z+y−z)(y+z−2y+z)

=(3y−2z)(−y+2z)

=6yz−3y

2

−4z

2

+2yz

=8yz−3y

2

−4z

2

Step-by-step explanation:

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