Question

упростите выражение (2,4 x - y) (y - 2,4) если x=0,1, а y= 2,4

Answer 1

$2.4xy - 5.76x - {y}^{2} + 2.4y = \frac{24 \times 1 \times 24}{10 \times 10 \times 10} - \frac{576 \times 1}{100 \times 10} - { (\frac{24}{10}) }^{2} + \frac{24 \times 24}{10 \times 10} = 0.576 - 0.576 - 5.76 + 5.76 = 0$