Question

The no. of quadratic equations having real roots and which do not change by squaring their roots is a)4 b)3 c)2 d)1​

Answer 1

Answer:

d) 3

Step-by-step explanation:

we give that the equation is quadratic equation have real roots and the quadratic equation done not change by squaring their roots

we have to find the number of quadratic equation

the possible roots

(1,1) (0,0) (1,0)

the general formula for equation is

-(sum of root)×(+product of root)

using the formula

then we have

A)when roots are 1 1

x^2-(1+1)x+1=0

x^2-2x+1=0

B)when roots are 1 0

x^2-x=0

c)when roots are 0 0

x^2 =0