What are the x-intercepts of y = 2x^2 - 3x – 20
y = 2x^2 - 3x -20
we need to determine x-intercept.
x-intercept is the point where the function intersect with the x-axis. In this case y value will be zero.
Then we need to calculate x values for the functin y to be zero.
y = 2x^2 - 3x - 20 = 0
==> (2x +5)(x-4) = 0
==> x1= -2/5
==> x2= 4
Then y intersect with x-axis in two point:
(-2/5, 0) and (4, 0)
check Approved by eNotes Editorial