MathematicsMedium129×since 2002Q5090If the roots of the equation bx2+cx+a=0b{x^2} + cx + a = 0bx2+cx+a=0 imaginary, then for all real values of xxx, the expression 3b2x2+6bcx+2c23{b^2}{x^2} + 6bcx + 2{c^2}3b2x2+6bcx+2c2 is :Aless than 4ab4ab4abBgreater than −4ab-4ab−4abCless than −4ab-4ab−4abDgreater than 4ab4ab4abCheck answerSkip