簡約 (-(26/5)^2)-4(1)(-24/5)

解

簡約

(- (\frac{26}{5})^{2}) - 4 (1) (- \frac{24}{5})

- \frac{196}{25}

十進法表記

- 7.84

解答ステップ

(- (\frac{26}{5})^{2}) - 4 (1) (- \frac{24}{5})

規則を適用する:

(- a) = - a

(- (\frac{26}{5})^{2}) = - (\frac{26}{5})^{2}

= - (\frac{26}{5})^{2} - 4 \cdot 1 \cdot (- \frac{24}{5})

(\frac{26}{5})^{2} = \frac{676}{25}

4 \cdot 1 \cdot (- \frac{24}{5}) = - \frac{96}{5}

= - \frac{676}{25} - (- \frac{96}{5})

- \frac{676}{25} - (- \frac{96}{5}) = - \frac{196}{25}

= - \frac{196}{25}