Quadratic Formula Application
Completed
AlgebraMedium
Find the roots of the quadratic equation: x² - 8x + 15 = 0 using the quadratic formula.
Discussion Forum
Share your thoughts, solutions, or ask questions about this problem.
Be the first to start the discussion!
Solutions
You've solved it! Here are the step-by-step solutions.
The quadratic formula is x = [-b ± sqrt(b²-4ac)] / 2a. For this equation, a=1, b=-8, c=15. Plugging these in gives x = [8 ± sqrt(64-60)] / 2 = [8 ± 2] / 2. The two roots are x = (8+2)/2 = 5 and x = (8-2)/2 = 3.
Tags
quadratic equations
algebra 2
Hint
Click the button to reveal a hint.