What is (2-sqrt(x^2-5))(2+sqrt(x^2-5)) ?

The solution to (2-sqrt(x^2-5))(2+sqrt(x^2-5)) is -x^2+9

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simplify (2-sqrt(x^2-5))(2+sqrt(x^2-5))

simplify

(2 - x^{2} - 5) (2 + x^{2} - 5)

- x^{2} + 9

Solution steps

(2 - x^{2} - 5) (2 + x^{2} - 5)

Apply Difference of Two Squares

(2 - x^{2} - 5) (2 + x^{2} - 5) : - x^{2} + 9

= - x^{2} + 9

9 (cos (x) + 3)

(u - 2) (4 u + 1 + 3)

(b + b c) (b + b^{^{'}} c) (b + d)

\frac{2 sin ^{2} ( x ) - cos ( x ) ( 1 - 2 cos ( x ) )}{sin ^{2} ( x )}

A (- 2, - 1) B (- 4, 1) c (- 1, 4)

What is (2-sqrt(x^2-5))(2+sqrt(x^2-5)) ?
The solution to (2-sqrt(x^2-5))(2+sqrt(x^2-5)) is -x^2+9