簡約 (1.999^2-4)/(1.999-2)

解

簡約

\frac{1.99 9 ^{2} - 4}{1.999 - 2}

3.999

解答ステップ

\frac{1.99 9 ^{2} - 4}{1.999 - 2}

因数

1.99 9^{2} - 4 : (1.999 + 2) (1.999 - 2)

= \frac{( 1.999 + 2 ) ( 1.999 - 2 )}{1.999 - 2}

\frac{( 1.999 + 2 ) ( 1.999 - 2 )}{1.999 - 2} = \frac{3.999 ( - 0.001 )}{- 0.001}

= \frac{3.999 ( - 0.001 )}{- 0.001}

共通因数を約分する:

- 0.001

= 3.999