-7 × -3 = 21
(Negative × Negative = Positive)
21 × 4 = 84
Answer = 84
Hope this helped☺☺
Question:
A rectangle has a height of 2x^4 and a width of x^2+8x+15. Calculate its area.
Answer:

Step-by-step explanation:
Given


Required
Determine the area of the rectangle
This is calculated as:



Answer:
x^2 - (4+13i)^2
Step-by-step explanation:
This product has the form (a-b)(a+b), which is a 'special product' equal to a^2 - b^2. Following this pattern, [x-(4+13i)][x-(4+13i)] = x^2 - (4+13i)^2. The 2nd term could be expanded if desired, but the above result is the most compact one possible.
Three unit's would be the numbers:
1, 2 and 3.
Any number you choose must be greater than 3 for example:
5, 8 or 10
Hope it helped,
BioTeacher101