Question

Матем на англ помогите срочно!! 25 баллов!!

Answer 1

Ответ:

y=ax²+4x-3 (a=a, b=4, c=-3)

1) According to the formula for the abscissa of the vertex of the parabola $x_{0}=- \frac{b}{2a}$, you can find first coefficient "a". (Vertex of the parabola is the axis of symmetry)

$2 = - \frac{4}{2a} \\ 2a = - \frac{4}{2} \\ 2a = - 2 \\ a = - 1$

2) To find the coordinates, you just need to substitute the roots (x) and find the values (y).

We can see that point M is on the y-axis, so x=0

$y_{m} = - 1 \times {0}^{2} + 4 \times 0 - 3 = - 3$

M(0;-3)

And x of the point N is 2.

$y_{n} = - 1 \times {2}^{2} + 4 \times 2 - 3 = - 4 + 8 - 3 = 1$

N(2;1)