SOLUTION: MAY SOMEONE PLEASE HELP ME WITH THIS PROBLEMS PLEASE??? Find 3y(2y3 - 5y). Use ^ to denote an exponent. Find 3x(4x2 + 2x - 5). Use ^ to denote an exponent. Find 4x(5x2 - 2x) +

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: MAY SOMEONE PLEASE HELP ME WITH THIS PROBLEMS PLEASE??? Find 3y(2y3 - 5y). Use ^ to denote an exponent. Find 3x(4x2 + 2x - 5). Use ^ to denote an exponent. Find 4x(5x2 - 2x) +       Log On


   

Question 149632: MAY SOMEONE PLEASE HELP ME WITH THIS PROBLEMS PLEASE???
Find 3y(2y3 - 5y). Use ^ to denote an exponent.
Find 3x(4x2 + 2x - 5). Use ^ to denote an exponent.
Find 4x(5x2 - 2x) + 3x2
Write an expression for the area of a rectangle with length 5x2+3x and width 3x2. Hint: A=LW.
. Write an expression for the perimeter of a rectangle with length 5x2 + 3x and width 3x2. Hint: P = 2L + 2W.
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
I;ll do the first one. Once you see that one, you can use the same steps to do the others.
Given3y%282y3+-+5y%29
Use distribution
%283y%2A2y%5E3%29+-+%283y%2A5y%29
Now find the product of all the like terms.
In this problem, multiply all the constants in each term. Then do the same for the terms with y in them
%283%2A2%29%2A%28y%2Ay%5E3%29+-+%283%2A5%29%2A%28y%2Ay%29
When multiplying variables with exponents, you add the exponents
6+%2A+y%5E%283%2B1%29+-+15%2A%28y%5E%281%2B1%29%29
6y%5E4+-+15y%5E2
Use the same method for the others. Note that the rectangle is given by
%285x%5E2%2B3x%29%283x%5E2%29