What is expand cos(x)(cos(x)-4)+7 ?

The solution to expand cos(x)(cos(x)-4)+7 is cos^2(x)-4cos(x)+7

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expand cos(x)(cos(x)-4)+7

expand

cos (x) (cos (x) - 4) + 7

cos^{2} (x) - 4 cos (x) + 7

Solution steps

cos (x) (cos (x) - 4) + 7

Apply the distributive law:

a (b - c) = ab - a c

cos (x) (cos (x) - 4) = cos (x) cos (x) - cos (x) \cdot 4

= cos (x) cos (x) - cos (x) \cdot 4 + 7

Simplify

cos (x) cos (x) - cos (x) \cdot 4 : cos^{2} (x) - 4 cos (x)

= cos^{2} (x) - 4 cos (x) + 7

10 (11 + 7)

\frac{1}{s ^{2} ( s ^{2} + 4 )}

(5 x^{2} + 10 x y, 5 x^{2} - 15 y^{2}) \cdot (\frac{3}{5}, \frac{4}{5})

\frac{2 x - 1}{( x + 2 ) ( x - 3 )}

\frac{( k + 1 ) ( k + 2 )}{2}

What is expand cos(x)(cos(x)-4)+7 ?
The solution to expand cos(x)(cos(x)-4)+7 is cos^2(x)-4cos(x)+7