Question

State which all quadratic equations have real roots, no real roots a)x²+x+7=0 b)3x²+6x+1=0 c)9x²+x+3=0 d) 11x²−12x−1=0 e) −13x²+3x+7=0 f)2x²−6x+3=0 g)X²−1/x−3=0, x≠0 h) −x²−2x−2=0
please answer fast....​

Answer 1

Answer:

just a minute I'll tell the answer

Answer 2

Step-by-step explanation:

Simply find discriminant (D) which means b^2-4ac.

There are three conditions on D

If b^2-4ac <0 then it's roots are not real .

If b^2-4ac >0 then it's roots are real .

If b^2-4ac = 0 then it's roots are real and equal.

a) Not real

b) Real

c) Not real

d) Real

e)Real

g)For this 1/x can be written as x^-1 so the roots will be Not real

h)Take minus common and change the signs of coefficients therefore it roots are not real

Hope you understand !!!!!!!!!!