Question

Let p. qe {1. 2. 3. 4). The number of equations of the form px2 + 2x + 1 = 0 having real roots is:​

Answer 1

Answer:

If p ,q , in {1,2,3,4}, then find the number of equations of the form p x^2+q x+1=0 having real roots. p = 4, then q2≥4p⇒q2≥16⇒q=4. Thus, there are 7 cases.

Answer 2

Answer:

If p ,q , in {1,2,3,4}, then find the number of equations of the form p x^2+q x+1=0 having real roots. p = 4, then q2≥4p⇒q2≥16⇒q=4. Thus, there are 7 cases