00:01
This problem, we're being asked to write an expression for the area in the perimeter for each rectangle.
00:05
So in this rectangle, we have a length of 5x and the width of 2x.
00:10
So don't forget to find the area of a rectangle, we simple multiply the length times the width.
00:15
So again, in this case, the length is 5x, and we need to multiply that by the width, which is 2x.
00:22
Well, this is an example of using our product rule.
00:25
So all we need to do is multiply the coefficients, so 5 times 2, that would be 10.
00:30
And then we have to add the exponents for our variables.
00:33
Remember, each variable has an exponent of 1.
00:36
So 1 plus 1 is 2.
00:37
So that means we'll have x squared...