Answer:(9y-7)(9y+7)
Step-by-step explanation:
81y^2-49
=(9y)^2-(7)^2
=(9y-7)(9y+7)
Answer: x² - 4
<u>Four less than</u> the <u>square of a number</u>
↓ ↓
(Take away 4) x²
Four less than the square of a number = x² - 4
Answer:
4,450
Step-by-step explanation:
You muiltiply 250 times 15 then you add 700
6 subsets are possible, but the number of subsets depends on the problem
