The roots of the equation 7x^2 +x-1=0 are: real and distinct
real and equal
not real
none of these

Correct option: First one -> real and distinct.

Step-by-step explanation:

To evaluate the roots of the equation 7x^2 + x - 1 = 0, lets find the discriminant Delta using the Bhaskara's formula:

Where a, b and c are coefficients of the quadratic equation (in this case, a = 7, b = 1 and c = -1)

So we have that:

To evaluate the roots of the equation, we have the following cases:

: Two roots real and distinct

: Two roots real and equal

: Two roots not real

In our case, we have , so the roots are real and distinct.

Correct option: First one

you need to show the graph

step-by-step explanation:

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.