Find the general solution using the method of variation of parameters for a particular solution (a) y"-3y'+2y= cos (e*) (b) y"+y tan x

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Which shows the graph of the solution set of 3y – 2x > –18?

What expression is equivalent to (84+16)