Using the identity x-y2-x-y2-2x2-y2 Compute the value of 42-22A - z 2B- 10C- 20D- 18

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(x+y)^2 + (x-y)^2 and (x+y)^2 - (x-y)^2

Using the ide...

Question

Using the identity $(x + y)^{2} + (x - y)^{2} = 2 (x^{2} + y^{2})$

Compute the value of $4^{2} + 2^{2}$

$z^{2}$

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Using the identity $(x + y)^{2} + (x - y)^{2} = 2 (x^{2} + y^{2})$

Compute the value of $4^{2} + 2^{2}$

{(x - y)}^{2} + {(y - z)}^{2} + {(z - x)}^{2} = 2 (x^{2} + y^{2} + z^{2} - x y - y z - z x)

{(x + y)}^{2} = x^{2} + 2 x y + y^{2}

{(3 p + 5)}^{2}

\frac{x + y}{x - y} + \frac{x - y}{x + y} - \frac{2 (x^{2} + y^{2})}{x^{2} - y^{2}}

(x + y)^{2} = (x - y)^{2} + 4 x y

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