Step-by-step explanation:
a) f(x) = -16x^2 + 24x + 16
= -4(4x^2 - 6x - 4)
= -4(2x - 4)(2x + 1)
b) The x-intercepts can be found when y = 0. This happens when
2x - 4 = 0 or x = 2
and
2x + 1 = 0 or x = -1/2
Therefore, the x-intercepts are at (2, 0) and (-1/2, 0)
c) As x approaches positive infinity, f(x) approaches negative infinity. When x approaches negative infinity, f(x) approaches negative infinity. In other words, the graph of this function opens downward.
d) From part (b), we that its graph intersects the x-axis at the 2 points. We also know that it opens downwards. Also, the graph intersects the y-axis at
f(0) = -16(0)^2 + 24(0) + 16
= 16
or at (0, 16)