Wet-cell batteries are typically used for AUTOMOBILES.
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The quadratic equations that have real roots are and .
<h3>What is the discriminant of a quadratic equation?</h3>
The value of a discriminant of a quadratic equation shows how many roots f(x) have. If the value of the discriminant is greater than 0 then the quadratic equation has real and distinct roots and if the value of the discriminant is equal to 0, then the quadratic equation has real and same roots. In case the value of the discriminant is less than zero then the quadratic equation will have no real roots.
In order to know if the quadratic equation has real roots or not, we need to find the discriminant of the given quadratic equations,
A.)
Here, a= -1, b=2 and c=-6
As the value of the discriminant is negative it will not have real roots.
B.)
Here, a= -2, b=3 and c=4
As the value of the discriminant is positive it will have real roots.
C.)
Here, a=2, b=1 and c=-6
As the value of the discriminant is positive it will have real roots.
A.)
Here, a=2, b=-1 and c=3
As the value of the discriminant is negative it will not have real roots.
Learn more about Discriminant:
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Width of foil is inches
<em><u>Solution:</u></em>
Given that area of the rectangle piece of foil is square inches
Its length is inches
To find: width of foil
<em><u>The area of rectangle is given as:</u></em>
To find the area of a rectangle, we multiply the length by the width
<em><u>Substituting the given values in above formula,</u></em>
Let us solve above expression to find width
Therefore width of foil is inches