Question

What is the nature of the roots of the quadratic equation 4x² - 8x + 9 = 0


Real


Not real


Real and equal


Real and unequal​

Answer 1

a = 4, b = -8 , c = 9 ( a,b,c are rational numbers)

discriminent ( D ) = b^2 - 4ac

D = (-8)^2 - (4×4×9)

D = 64 - 144

D = -80

D < 0 , roots are imaginary or complex.