化简 sqrt(80)x^3

解答

化简

80 x^{3}

45 x^{3}

求解步骤

80 x^{3}

80

质因数分解:

2^{4} \cdot 5

= 2^{4} \cdot 5 x^{3}

使用根式运算法则:

ab = a b, a \geq 0, b \geq 0

2^{4} \cdot 5 = 2^{4} 5

= 2^{4} 5 x^{3}

2^{4} = 4

= 45 x^{3}

s im pl i f y 2704

s im pl i f y 15 - \frac{2}{3}

q u a d r a t i c f or m u l a x^{2} + 7 x - 4 = 0

so l v e f or x, x - \frac{5}{x} < 4

so l v e f or r, 5 (r - 1) = 2 (r - 4) - 6