Find the values of k for which the equation (2k-3)x^2 - kx + (k-1) = 0

A quadratic equation has two equal roots when its discriminant is equal to 0. Calculating the discriminant of the given equation: D = k2 - 4(k-1)(2k-3) = k2 - 8k2+20k-12 = -7k2+20k-12=0 Solving this equation for k: 7k2-20k+12=0 D = 100-84 = 16 k1,2=(10+-4)/7 => k = 6/7, k=2

KP

Related Maths A Level answers

All answers ▸

What is the probability to obtain exactly 2 heads out of 3 tosses of a fair coin?


Rationalise the denominator of \frac{6}{\sqrt{2}}.


Find the integral of y=6/(e^x+2) using calculus.


((x^2+4x)/2x)-((x^2-4x)/x)