What is sqrt(x+y+9)*sqrt(x-y-9) ?

The solution to sqrt(x+y+9)*sqrt(x-y-9) is sqrt((x+y+9)(x-y-9))

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simplify sqrt(x+y+9)*sqrt(x-y-9)

simplify

x + y + 9 \cdot x - y - 9

(x + y + 9) (x - y - 9)

Solution steps

x + y + 9 x - y - 9

Apply radical rule:

a b = a \cdot b,

assuming

a \geq 0, b \geq 0

x + y + 9 x - y - 9 = (x + y + 9) (x - y - 9)

= (x + y + 9) (x - y - 9)

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(- 25.5) (1 - 58.68)^{- 1}

(2 x) (4 x y^{2})

8 e^{- \frac{π}{6}}

4 x^{2} (x^{2} +!)

What is sqrt(x+y+9)*sqrt(x-y-9) ?
The solution to sqrt(x+y+9)*sqrt(x-y-9) is sqrt((x+y+9)(x-y-9))