25. Which of the following expressions has factor (2x-y) and (2x+y)?
a)2x2+y2
b)2x2-y2 c)4x2+y) d) 4x2 - y2
26. Which of the following is the complete factored form of a2-b??
a)(a+b)(a+b) b)(a-b)(a-b) c)(a+b)(a-b) d)(ab-b)​