Question

Answer this....and i will mark you as brainliest..​

Answer 1

3) when determinants of a quadratic polynomial is equal to zero, the polynomial has only one root

determinant D of a quadratic equation of the form ax^2 + bx + c = 0 is given by

D = b^2 - 4ac

if D = 0, the roots are equal i.e. only one root is there.

4) when D < 0, there is no root in real numbers

x^2 + x + 1 = 0

3x^2 + 4x + 2 = 0

x^2 + 5x + 7 = 0

in all the above cases, D < 0, so the equation will not have any real roots