Question

Complete the statements.

Graph _ has one real root.

Graph _ has a negative discriminant.

Graph _ has an equation with coefficients

a = 1, b = 4, c = -2

Answer 1

1) B

2) A

3) C

Explanation:

Graph A has a negative discriminant because it does not touch the x-axis so the roots will be complex .

Graph B has one real root because is a graph of a perfect square .

Graph C has an equation with coefficients because it has to real roots (where the graph intersects the x axis.

Answer 2

Explanation:

Graph A has a negative discriminat because it does not touch the x-axis so the roots will be complex

Graph B has one real rooth because is a graph of a perfect square

Graph C has an equation with coeficients because it has to real roots (where the graph intersects the x axis.