因式分解 a^3+cos^3(x)

解答

因式分解

a^{3} + cos^{3} (x)

(a + cos (x)) (a^{2} - a cos (x) + cos^{2} (x))

求解步骤

a^{3} + cos^{3} (x)

使用立方和公式:

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

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

= (cos (x) + a) (cos^{2} (x) - cos (x) a + a^{2})

f a c t or A e^{2 x} + B x e^{2 x}

f a c t or 3 6 + 26

f a c t or \frac{64}{8}

f a c t or 21 6^{3} + 1

f a c t or 3 a x + 8 b y - 12 b x - 2 a y