The answer is A.
Hope it helps
If your quadratic function has x intercepts of 4 and -3, that means that the points are (4, 0) and (-3,0), or the values x has when y=0. Since your quadratic (which represents y) must then equal 0, then your factors of that equation would potentially equal 0 as well. That means that if x=4, then subtract 4 from each side to get x-4=0, and so one factor is (x-4) Similarly your other factor would be (x+3).
<span>To get your quadratic, FOIL: </span>
<span>(x-4)(x+3)=0 </span>
<span>x^2-x-12=0</span>
X+1 is the answer for this question
The speed that should be taken by Lionel to get to the destination will be 78 miles per hour.
<h3>How to calculate the speed</h3>
From the information given, when Lionel drives from Barcelona to Madrid, 390 miles, it takes him about 6.5 hours.
The speed to make the trip in 5 hours will be:
Speed = Distance / Time
Speed = 390/5
Speed = 78 miles per hour.
Learn more about speed on:
brainly.com/question/4931057