2x2 + 3x - 20 = (x + 4)(2x - 5).
The discriminant is 1.
d/dx 2x2+3x+7=4x+3
y=3x+12
If 2x2 + 3x + 9 = 0 then x = -0.75 - 1.984i or -0.75 + 1.984i where i is the imaginary square root of -1.
2x2 equals 5
B- It is a many-to-one function
2x2 + 3x - 20 = (x + 4)(2x - 5).
If: 2x2-3x+1 = 0 Then: x = 1 or x = 1/2
The discriminant is 1.
2x2 + 3x + 1 = (x + 1)(2x + 1)
d/dx 2x2+3x+7=4x+3
(2x - 1)(x - 1) so x = ½ or 1
yes
factorises as (2x + 1)(x + 1) so x = -0.5 or -1
-11
y=3x+12