y= -x^2 + 3x + 18
We need to
find the x-intercept of the curve y.
The x-intercept is the
point where the curve y meets the x-axis.
Then the values
of y would be zero.
==> -x^2 + 3x + 18 =
0
==> We will factor
-1.
==> -(x^2 -3x -18) =
0
Now we will
factor.
==> -(x-6)(x+3) =
0
==> x = 6 , -3
There
are 2 values for x. Then, the curve y meets the x-axis at two points ( 6,0) and
(-3,0)
Then x-intercepts are (6,0) and
(-3,0)
No comments:
Post a Comment