What is expand (2sin(x)-1)(sin(x)+2) ?

The solution to expand (2sin(x)-1)(sin(x)+2) is 2sin^2(x)+3sin(x)-2

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expand (2sin(x)-1)(sin(x)+2)

expand

(2 sin (x) - 1) (sin (x) + 2)

2 sin^{2} (x) + 3 sin (x) - 2

Solution steps

(2 sin (x) - 1) (sin (x) + 2)

Apply FOIL method

(2 sin (x) - 1) (sin (x) + 2) : 2 sin^{2} (x) + 3 sin (x) - 2

= 2 sin^{2} (x) + 3 sin (x) - 2

sin ((2 n - 1) \frac{π}{4})

3 x^{3} (4 cos (x) - x sin (x))

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

7 e^{5 t + 2} + 5 e^{(3 + t)^{2}}

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

What is expand (2sin(x)-1)(sin(x)+2) ?
The solution to expand (2sin(x)-1)(sin(x)+2) is 2sin^2(x)+3sin(x)-2