What is (sqrt(x^2-9)-4)(sqrt(x^2-9)+4) ?

The solution to (sqrt(x^2-9)-4)(sqrt(x^2-9)+4) is x^2-25

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simplify (sqrt(x^2-9)-4)(sqrt(x^2-9)+4)

simplify

(x^{2} - 9 - 4) (x^{2} - 9 + 4)

x^{2} - 25

Solution steps

(x^{2} - 9 - 4) (x^{2} - 9 + 4)

Apply Difference of Two Squares

(x^{2} - 9 - 4) (x^{2} - 9 + 4) : x^{2} - 25

= x^{2} - 25

(- x + 8 + 3) (x + 8 + 3)

(e^{x}) (C + C e^{x})

3 (x + y = 7)

\frac{( x - 2 ) ( x + 3 )}{x ( x - 4 )}

\frac{s ^{2} + 5 s}{( s - 1 ) ( s + 1 ) ^{2}}

What is (sqrt(x^2-9)-4)(sqrt(x^2-9)+4) ?
The solution to (sqrt(x^2-9)-4)(sqrt(x^2-9)+4) is x^2-25