A baker bought 7500 grams of flour for 19.20.How much did each kilogram cost
2 answers:
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For this case we have the following function:
we have:
Where:
By definition, the discriminant of a quadratic equation is given by:
Two different real roots
Two equal real roots
: Two different complex roots
Substituting the values we have:
We have two equal real roots.
To find the intersections with the x axis, we do
We apply the quadratic formula:
Substituting the values we have:
The intersection with the x axis is
Answer:
The intersection with the x axis is