Question

how many solutions does the equation -3.5n^2+70n+280 have? I have 2 real solutions.

Answer 1

using discriminant

Answer 2

b^2 -4ac
70^2 - 4(-3.5)(280)

If this is positive --> 2 real solution

if this is zero ---> repeated root(one soloution)

negative ----> 2 complex

Answer 3

70^2 - 4(-3.5)(280) = 8820
two real solutions

Answer 4

is that because the equations is greater than 0?