Free · Worked example · 14 problems · Answer key · US Letter
How to do it
Factor, set each factor equal to 0, and solve.
x2−7x−18=0 (x+2)(x−9)=0multiply to −18, add to −7 x+2=0or x−9=0a product is 0 only if a factor is 0 x=−2 or x=9 Example problems
- x2−6x−7=0
- x2−49=0
- x2−17x+72=0
- x2+3x=0
Radicals, quadratics and rational expressions
- Simplifying square roots
- Adding and multiplying radicals
- Solving quadratic equations by factoring
- Completing the square
- The quadratic formula
- Simplifying rational expressions
- Multiplying and dividing rational expressions