You round the number to the nearest 100 :- So 265 is closer to 300 that it is to 200 so you use 300.
436 is closest to 400 then 500 so we use 400.
so the estimate is 300 + 400 = 700.
Answer:
189
Step-by-step explanation:
B is the correct answer
(1 -2y)(1 +2y)
The difference of squares is factored as ...
... a² - b² = (a -b)(a +b) . . . . . . . . a form you should keep handy
Here, you have a=1, b=2y, so your factored form is ...
... 1 -4y² = (1 -2y)(1 +2y)
