Answer:
Step-by-step explanation:
What is the question? So far you have ran 28 miles in 4 hours.
Answer:
y = (x +4)(x +2)²(x +1)
Step-by-step explanation:
The function has a generally U shape, so is of even degree. The zero where the graph touches, but does not cross, the x-axis is a zero of even multiplicity. The minimum degree of a function that matches this description is 4. It will have zeros at x=-4, -2 (multiplicity 2), and -1. The constants in the corresponding binomial factors will be the opposite of these values, so the factored form is ...
y = (x +4)(x +2)²(x +1)
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The multiplicity of a zero is the power of the corresponding factor.
Factor using ac method
mulitply 8 and -3
-24
find what 2 factors of -24 add to -2
-6 and 4
split middle up like that
8x²+4x-6x-3=0
gropu and factor
(8x²+4x)+(-6x-3)=0
4x(2x+1)+(-3)(2x+1)=0
undistribute
(4x-3)(2x+1)=0
set each to zero
4x-3=0
4x=3
x=3/4
2x+1=0
2x=-1
x=-1/2
x=-1/2 or 3/4
Here you go, hope this helps. If you need help with anything else feel free to reply to this comment