What is expand-cos(3)(1+3x^2) ?

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

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expand-cos(3)(1+3x^2)

expand

- cos (3) (1 + 3 x^{2})

- cos (3) - 3 x^{2} cos (3)

Solution steps

- cos (3) (1 + 3 x^{2})

Apply the distributive law:

a (b + c) = ab + a c

- cos (3) (1 + 3 x^{2}) = - cos (3) \cdot 1 - cos (3) \cdot 3 x^{2}

= - cos (3) \cdot 1 - cos (3) \cdot 3 x^{2}

Simplify

- cos (3) \cdot 1 - cos (3) \cdot 3 x^{2} : - cos (3) - 3 x^{2} cos (3)

= - cos (3) - 3 x^{2} cos (3)

- 7 \cdot 9

\frac{5}{3 2 + 4}

(3 x y + 4 z)^{2}

(1 + 7 i) - (12 - 8 i)

(x^{5} y^{4})^{\frac{1}{2}}

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