Factoring Explained 05A2Ac
1. Let's start by stating the problem: factoring is the process of breaking down an expression into simpler expressions (factors) that, when multiplied together, give the original expression.
2. The most common factoring formulas include:
- Difference of squares: $$a^2 - b^2 = (a - b)(a + b)$$
- Perfect square trinomial: $$a^2 \pm 2ab + b^2 = (a \pm b)^2$$
- Factoring out the greatest common factor (GCF): find the largest factor common to all terms and factor it out.
3. Important rules:
- Always look for a GCF first.
- Recognize special patterns like difference of squares or perfect square trinomials.
- For quadratics, try to find two numbers that multiply to the constant term and add to the middle coefficient.
4. Example: Factor $$x^2 - 9$$.
- Recognize this as a difference of squares: $$x^2 - 3^2$$.
- Apply the formula: $$(x - 3)(x + 3)$$.
5. Another example: Factor $$2x^2 + 8x$$.
- Find the GCF: 2x.
- Factor it out: $$2x(x + 4)$$.
6. Factoring helps simplify expressions and solve equations by setting each factor equal to zero.
If you have a specific expression you'd like to factor, please share it!