Question

Y = 0.4x^2 + 2x + 2.5 Help!

Answer 1

Answer: I’m positively sure that it’s -2.5

Answer 2

Explanation:

Are you trying to find the x-intercepts?

Pythagorean Theorem:

x = [-2 ±√(2^2-4(0.4)(2.5)]/[2(0.4)] = -2.5