Question

y=-2.1x2+3+5
Помогите с алгеброй

Answer 1

$y - 2.1x2 + 3 + 5 \\ 0 = - 4.2x + 3 + 5 \\ 0 = - 4.2x + 8 \\ 4.2x = 8 \\ x = \frac{40}{21}$