Question

If x = –3 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the equation? The discriminant is negative. The discriminant is –3. The discriminant is 0. The discriminant is positive.

Answer 1

Explanation:

Answer 2

`\text{ if } \Delta=0\text{ then there is one x-intercept : }x=-(b)/(2a)\\\\ \text{ if } \Delta\ \textless \ 0\text{ then there are no x-intercept : } x=\varnothing\\\\ \text{ if } \Delta>0\text{ then there are two x-intercept : }x_1,x_2=(-b\pm√(\Delta))/(2a)\\\\`

Answer : The discriminant is 0