化简 sqrt((\sqrt{20)-(3-sqrt(5)))^2}

解答

化简

(20 - (3 - 5))^{2}

35 - 3

十进制

3.70820 \dots

求解步骤

(20 - (3 - 5))^{2}

使用根式运算法则:

a^{2} = a, a \geq 0

(20 - (3 - 5))^{2} = 20 - (3 - 5)

= 20 - (3 - 5)

20 = 25

- (3 - 5) = - 3 + 5

= 25 - 3 + 5

f a c t or s^{2} + 6 s + 9

8 \div 8

e x p an d (2 x + 8)^{2}

s im pl i f y \frac{- 9 + 8 i}{- 3 + 9 i}

s im pl i f y 2 x + 7 x + x - 8 x