Solving Quadratic Equations Using Four Methods

Method 1: Factoring

When your equation is simple, factoring is your go-to method. First, put your equation in standard form (ax² + bx + c = 0). Then, find two numbers that add up to b and multiply to c. For example, with x² + 5x + 6 = 0, we factor to get $x + 3$$x + 2$ = 0, giving us solutions x = -3 and x = -2.

Method 2: Taking the Square Root

This method works great when your equation is in vertex form. Rewrite the equation as $ax + b$² = c, then take the square root of both sides (remember to include ±). For example, with 2x² - 5x + 3 = 0, we can transform it and find that x = 5/4 ± √2/4, giving us two solutions.

Method 3: Completing the Square

This method helps transform messy equations into something more manageable. Start with ax² + bx = c, then add $b/2$² to both sides to create a perfect square trinomial. For a problem like 3x² - 8x + 4 = 0, we rearrange, add the right value, and solve to get our answers.

Method 4: Quadratic Formula

The most powerful method works for any quadratic equation. Simply identify the values of a, b, and c, then plug them into the formula x = $-b ± √(b² - 4ac)$/2a. This is the Swiss Army knife of quadratic solving - it always works!

Pro Tip: Always check your answers by plugging them back into the original equation. This simple step can save you from careless mistakes on tests!