What is expand (z-rcos(θ))^2 ?

The solution to expand (z-rcos(θ))^2 is z^2-2zrcos(θ)+r^2cos^2(θ)

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expand (z-rcos(θ))^2

expand

(z - r cos (θ))^{2}

z^{2} - 2 zr cos (θ) + r^{2} cos^{2} (θ)

Solution steps

(z - r cos (θ))^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(z - r cos (θ))^{2} = z^{2} - 2 zr cos (θ) + (r cos (θ))^{2}

= z^{2} - 2 zr cos (θ) + (r cos (θ))^{2}

Simplify

(r cos (θ))^{2} : r^{2} cos^{2} (θ)

= z^{2} - 2 zr cos (θ) + r^{2} cos^{2} (θ)

\frac{( 1 + x ) ^{\frac{4}{5}}}{1 + x}

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

(3 + z) (3 - z)

3 (12 - 2)

S (2, 4) y T (0, - 6)

What is expand (z-rcos(θ))^2 ?
The solution to expand (z-rcos(θ))^2 is z^2-2zrcos(θ)+r^2cos^2(θ)