Multiply the two brackets together
(3-21)(3+21)
(3)(3)(3)(+21)(-21)(3)(-21*21)
9+63-63-441
- 441 because whenever multiplying a - negative number and a + positive number = - negative number
9-441
= -432
Answer: -432
Imaginary numbers are used when a number inside of a square root is negative.
What ? answer? dont know which one
It is 255 cm^2
This is a very basic area problem. You should try refreshing on some of your multiplication and addition skills. Try reading patterns, maybe. Also learning geometric proofs is VITAL.
Answer: 7 units
Step-by-step explanation:
Just plot the numbers, then count the distance between them
