化简 1/(5+sqrt(6))

解答

化简

\frac{1}{5 + 6}

\frac{5 - 6}{19}

十进制

0.13423 \dots

求解步骤

\frac{1}{5 + 6}

乘以共轭根式

\frac{5 - 6}{5 - 6}

= \frac{1 \cdot ( 5 - 6 )}{( 5 + 6 ) ( 5 - 6 )}

1 \cdot (5 - 6) = 5 - 6

(5 + 6) (5 - 6) = 19

= \frac{5 - 6}{19}

9 (2 k + 3) + 2 = 11 (k - 5)

s im pl i f y \frac{3}{4 - 9 i}

f a c t or 6 x^{2} + 23 x y + 7 y^{2}

7 (r - 3) \geq - 13

- 3 x^{2} + x - 5 = 0