Question

if a and b can take values 1 2 3 4. then the number of the equations of the form ax²+bx+c=0 having real roots is a)6, b)7, c)10, d)12

Answer 1

Answer:

Step-by-step explanation:

For there to be real roots, b²-4ac >=0

so b² - 4a >=0

b² >= 4a

so if b = 4, a can be 1, 2, 3, or 4

if b = 3, then a can be 1 or 2

if b =2, then a can be 1

b can't be 1

So 4 + 2 + 1 = 7 possible equations.

Answer 2

Step-by-step explanation:

Refer to the attachment..