ANSWER:
(2y - 1)(2y + 1)
Using identity (a + b)(a - b) = a² - b².
(2y)² - (1)²
4y² - 1.
Answer:
to multiply-----
(2y-1)(2y+1)
2y(2y+1)-1(2y+1)
4y^2+2y-2y-1
=4y^2-1
A=2πrh
Step-by-step explanation:
A=2*22/7*4*9
=230
84
7+3-2=3+7-2
hope you can understand