What is the solution set of the equation

Question

i need help x²-4x-1=0

Answer 1

x² - 4x - 1 = 0



This cannot be factored so use the quadratic formula:

x = [4 ± √((-4)² - 4(1)(-1))] / 2(1) = [4 ± √20] / 2 = [4 ± 2√5] / 2 = 2 ± √5 ≈ -0.236, 4.236