If you're going to use technology (Brainly) to solve this problem, you might find you get a quicker answer using the technology of your graphing calculator.
It is often convenient to cast the problem in the form f(θ) = 0. You can do that by adding 1 to both sides of the equation.

Answer:
-x^3*(x + 1)
Step-by-step explanation:
Perform the indicated multiplication and then write out all the terms in descending order by powers of x:
-x^3(5x+1)+4x^4 = -5x^4 - x^3 + 4x^4
= -x^4 - x^3, or = -x^3*(x + 1)
Answer:
L = 12
W = 20
Step-by-step explanation:
The perimeter of the rectangle is 64.
2L + 2W = 64
The length and width of a rectangle are in a 3:5 ratio.
3 + 5 = 8
64/8 = 8
2L = 8 * 3 = 24
L = 24/2 = 12
2W = 8 * 5 = 40
W = 40/2 = 20