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The degree of a polynomial is the highest exponent of a variable.
What is the highest exponent of a variable?
Use the Distributive Property to write the polynomial in standard form.
How can you rewrite a square of a binomial?
2
5
3
6
To find the degree of a polynomial, we need to find the highest exponent of a variable in it. Consider the given function.
Similarly as in Part A, let's find the highest exponent of a variable.
Examining the given polynomial function, we can see that it is in factored form.
f(x)=5(x+3)(x-2)(x+7)
Distribute 5
Distribute (5x+15)
Distribute (5x^2+5x-30)
Now that we have rewritten the polynomial in standard form, we can see that its highest exponent is 3. f(x)=5x^3+40x^2+5x-210 Therefore, the degree of the polynomial is 3.
Once again, the given polynomial function is in factored form.
y=(x-3)^2(x+1)(x^3+1)
To determine its degree, we will rewrite it in standard form. Note that the first factor is a square of a binomial. This allows us to write is as a trinomial.
(a-b)^2=a^2-2ab+b^2
Multiply
Calculate power
Now, we can again use the Distributive Property to rewrite the polynomial in standard form.
Distribute (x^2-6x+9)
Distribute x
Distribute 1
Add and subtract terms
Distribute (x^3-5x^2+3x+9)
Finally, we can see that its highest exponent is 6. y=x^6-5x^5+3x^4+10x^3-5x^2+3x+9 Therefore, the degree of the polynomial is 6.