(2a + b)(2c + d)
Chat with our AI personalities
4ac + 2ad + 2bc +bd = 2a*(2c + d) + b*(2c + d) = (2c + d)*(2a + b)
(2a + b)(2c + d).
It cannot be factored because the discriminant of b2-4ac is less than zero.
Full equation is (-b +/- sqrt(b2 - 4ac))/2a. Try it with x2 - 2x - 3, where a = 1, b = -2 and c = -3...
Discriminant = (b2-4ac) = (25 - 4x2x3) = 1