Answer:
If a negative number is multiplied with a positive number, it will be negative. If two positive numbers are multiplied, it will be positive. If two negative numbers are multiplied, it will also be positive.
Step-by-step explanation:
Solution:
we have been asked to find the product of (x+y+3)(x+y-4).
we will multiply term by term as below

Hence the the product of (x+y+3)(x+y-4) is 
Answer:
400 mm
Step-by-step explanation:
to convert cm to mm, you add a 0, or more specifically, multiply by 10. so, 15 × 10= 150. 250+150=400.
Answer:
The answer is 
Step-by-step explanation:
The formula is:

In this case :

To get the simples form notice both 104 and 288 are divisible by 8 and 104/8 = 13 and 288/8 = 36.
Thus 