OK. That's the equation of a parabola, symmetrical with respect to the x-axis,
opening downward, with its nose at y=1.
What's the question ?
f(x) = 2x2 + 4x - 7
1
2
The curve turns at a minimum: (2.5, -12)
(1, 9)
(3, 1)
x = 1 and y = -2
y=x+1 there for answer is 2
y=10
They are expressions.
1
Y = 2x + 1