What is expand (9sin(x)-1)(9sin(x)+1) ?

The solution to expand (9sin(x)-1)(9sin(x)+1) is 81sin^2(x)-1

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expand (9sin(x)-1)(9sin(x)+1)

expand

(9 sin (x) - 1) (9 sin (x) + 1)

81 sin^{2} (x) - 1

Solution steps

(9 sin (x) - 1) (9 sin (x) + 1)

Apply Difference of Two Squares

(9 sin (x) - 1) (9 sin (x) + 1) : 81 sin^{2} (x) - 1

= 81 sin^{2} (x) - 1

3 (5 + 6)

x^{2} (\frac{1}{x} - \frac{1}{y})

\frac{9 x ^{2} - 9 x + 6}{( x - 1 ) ( 2 x - 1 ) ( x + 2 )}

2 lo g_{10} (3) (1 - x) + 3

\frac{2 x}{( x + 1 ) ( x - 1 )}

What is expand (9sin(x)-1)(9sin(x)+1) ?
The solution to expand (9sin(x)-1)(9sin(x)+1) is 81sin^2(x)-1