What is expand (sqrt(x+4)-2)(sqrt(x-4)+2) ?

The solution to expand (sqrt(x+4)-2)(sqrt(x-4)+2) is sqrt(x^2-16)+2sqrt(x+4)-2sqrt(x-4)-4

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expand (sqrt(x+4)-2)(sqrt(x-4)+2)

expand

(x + 4 - 2) (x - 4 + 2)

x^{2} - 16 + 2 x + 4 - 2 x - 4 - 4

Solution steps

(x + 4 - 2) (x - 4 + 2)

Apply FOIL method

(x + 4 - 2) (x - 4 + 2) : x^{2} - 16 + 2 x + 4 - 2 x - 4 - 4

= x^{2} - 16 + 2 x + 4 - 2 x - 4 - 4

\frac{x ^{2} y ^{2}}{( x ^{2} + y ^{2} ) ^{3}}

(x + 4) (x - 4)

\frac{4 e ^{- 2 s} - 4}{s ( s + 2 )}

(2 x + y) (6 - x + 8 y)

What is expand (sqrt(x+4)-2)(sqrt(x-4)+2) ?
The solution to expand (sqrt(x+4)-2)(sqrt(x-4)+2) is sqrt(x^2-16)+2sqrt(x+4)-2sqrt(x-4)-4