Practice problem
For which values of aaa will the equation ax2+4x−1=0ax^2+4x-1=0ax2+4x−1=0 have at least one real solution?
a≤4a \le 4a≤4
a≤16a \le 16a≤16
a≥−4a \ge -4a≥−4
a≥−16a \ge -16a≥−16
a>−4a > -4a>−4
a<−4a < -4a<−4
Type a concept, like “slope” or “photosynthesis”.