Greatest Common Factor for Monomials
Find the greatest common factor for each group of monomials.
40. 16x²z, 40xz², 72x³
Factoring a Difference of Two Squares
Factor each polynomial.
16. 9a² - 64b²
Factoring with Two Variables
Factor each polynomial.
64. h²- 9hs + 9s²
The ac Method
Factor each trinomial using the ac method.
26. 21x² + 2x - 3
Factoring a Difference of Two Fourth Powers
Factor each polynomial completely.
36. m⁴ - n⁴
The Zero Factor Property
Solve by factoring.
32. 2w(4w + 1) = 1
DQ 1: How would you use this procedure to determine if a given polynomial is prime, that is, determine that it cannot be factored into a product of two linear polynomials (note pps 321 and 327 of the text, Prime Polynomials)?
(7) P(x) = ax2 + bx + c, where a ≠ 1,
DQ 3: In the procedure for determining the prime factorization of an integer, why is it that we need not consider dividing by prime factors greater than the square root of that integer?
DQ 4: In the prime factorization of an integer, what is the maximum number of prime factors greater than the square root of that integer? If there is a prime factor greater than the square root of that integer, can the integer be a perfect square?
Note the polynomial form P(x) = x2 - a. And, note that the two linear factors ( x + sqrt(a) ) ( x - sqrt(a) ), when multiplied together, yield
( x + sqrt(a) ) ( x - sqrt(a) ) = x2 - a.
Consequently, we note that an equation of the form
x2 - a = 0
can be factored as
( x + sqrt(a) ) ( x - sqrt(a) ) = 0,
giving the two zeros of our equation
x = sqrt(a), -sqrt(a).
Team Exercise Two:
Consider the quadratic expression representing displacement of an object thrown toward earth at an initial velocity of 32 ft / sec from a height of 128 ft.
h(t) = -16t2 - 32t + 128
For this expression, determine the GCF (Greatest Common Factor) of our three coefficients and, as in exercise one, express h(t) as a product of this GCF and a resulting trinomial. Factor our resulting trinomial into a product of two binomials, thus completely factoring our expression h(t). What does a solution, or zero, of the equation
-16t2 - 32t + 128 = 0
represent? Determine the two solutions.© BrainMass Inc. brainmass.com October 16, 2018, 10:34 pm ad1c9bdddf
This solution performs many operations in factoring polynomials.
Algebra Operations with Polynomials
1. For each polynomial listed below, determine
i the degree of the polynomial
ii the coefficient of the leading term
iii the constant term
a. P(x) = x + 1
b. Q(x) = 3x + 2
c. R(x) = x2 + 2x + 1
d. W(x) = 4x2 + x + 3
e. Z(x) = 3x3 + 2x2 + x
Questions 2 through 8 below refer to the polynomials P(x), Q(x), R(x), and Z(x) of question #1.
2. What is the value of P(1), that is, P(x) above evaluated at x = 1?
3. What is the value of Z(1), that is, Z(x) evaluated at x = 1?
4. What is the value of Z(2)?
5. What is the polynomial resulting from the polynomial addition P(x) + Q(x)?
6. What is the polynomial resulting from the polynomial subtraction Q(x) - P(x)?
7. What is the polynomial resulting from the polynomial multiplication P(x) * Q(x)?
8. What is the polynomial resulting from the polynomial division R(x) / P(x)?
10. Simplify. Write answers without negative exponents