Answer:
a) 
b) 
c) 
d) 
Explanation:
Factor the expression using difference of two squares.
Formula:
Part a) x²-81
write 81 as perfect square.




Part b) (3x+y)² -(2y)²




Part c) 4-(x-1)²
write 4 as perfect square,





Part d) (x+2)²-(y-2)²




Answer:
(7x^2 -1)(x - 2).
Step-by-step explanation:
7x^3 - 14x^2 - x + 2
We can factor this by grouping - that is factoring the first 2 terms and the last 2:
= 7x^2(x - 2) - 1(x - 2) <-- the x - 2 is common to both parts so we have:
(7x^2 -1)(x - 2).
First how much does the nickels worth?
It worths 5 cents Which is .5 in decimal and now you got to divide
So divide 7.45 over .5 how much is that ?
7.45/.5=14.9
There are approximately 15 nickels.
Answer:
-16(1)^2+60(1)= -16+60=44
Step-by-step explanation: