Download presentation
Presentation is loading. Please wait.
Published byKristian Lenard Weaver Modified over 9 years ago
1
Solving Polynomials
2
Factoring Options 1.GCF Factoring (take-out a common term) 2.Sum or Difference of Cubes 3.Factor by Grouping 4.U Substitution 5.Polynomial Division (to factor out a binomial term)
3
Take-out common monomial (GCF Factoring) 1) 2)
4
Sum or Difference of Cubes 1.Solve 2.Solve
5
Factor by Grouping 3) 4)
6
Solving an Equation of Quadratic Type (“U” Substitution) 5) 6)
7
Synthetic Division Use synthetic division to find the quotient and the remainder when is divided by x – 2. If x – 2 is a factor, then factor the polynomial completely. How can we determine whether x – 2 is a factor?
8
Factor Theorem A polynomial f(x) has a factor x – a iff the remainder is 0.
9
Example 1 Use synthetic division to determine whether x – 1 is a factor of x³ - 1.
10
Example 2 x = -4 is a solution of x³ - 28x – 48 = 0. Use synthetic division to factor and find all remaining solutions.
11
Example 3 x + 3 is a factor of y = 3x³ + 2x² - 19x + 6. Find all the zeros of this polynomial.
12
Rational Roots (Zeros) Test Every rational zero that is possible for a given polynomial can be expressed as the factors of the constant term divided by the factors of the leading coefficient.
13
Example 4 List all possible rational roots for the polynomial y = 10x³ - 15x² - 16x + 12. Then, divide out the factor and solve for all remaining zeros.
14
Example 5 List all possible rational roots for the polynomial y = x³ - 7x – 6. Then, divide out the factor and solve for all remaining zeros.
15
Practice Pg. 213 (53 – 67 odd, 68) Pg. 278 (41, 43, 55, 57, 59)
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.