What is the value of "c" in the quadratic equation 3x 2 + 5x + 7 = 0? 3 5 7
2 answers:
Answer: The correct option is (C) 7.
Step-by-step explanation: We are given to find the value of 'c' in the following quadratic equation:
We know that
the standard quadratic equation is of the following form:
So, a is the coefficient of x², b is the coefficient of x and c is the constant term in the equation.
Comparing equation (i) with the standard quadratic equation, we get
the constant term, c = 7.
Thus, the required value of c is 7.
Option (C) is CORRECT.
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Answer: The value of a is 1. The value of b is -1. The value of c is 1. The value of the discriminant is -3. The quadratic function will not intersects the x-axis.
Explanation:
The standard form of a quadratic equation is,
The given function is,
It can be written as,
By comparing this equation with the standard form of quadratic equation. we get,
The formula for discriminant is,
The value of the discriminant is -3.
If D<0, it means the function have no real roots.
If D=0, it means function have one real roots.
If D>0, it means function have two real roots.
Since D<0 it means the function have no real roots. So the function will not intersect the x-axis at any point.