Factor completely.
9x^4 -225y^8

Question

Factor completely.
9x^4 -225y^8

akashdeepdeb · Answer

Use 
a^2 - b^2 = (a+b)(a-b) [IDENTITY]
So we can write your expression as
(3x)^2 - (15y4)^2
Now use the identity and tell me what you think the answer would be! :D

akashdeepdeb · Answer

What do you think?? :)

anonymous · Answer

Haha I have no idea!!

akashdeepdeb · Answer

CHILL :')
The answer should be?
(3x-15y^4)(3x+15y^4)
Go through the Identity once more! :)
Understood? :)

anonymous · Answer

sorry no.. not understood!:( im taking an expensive online class of algebra II lol.. and this is one of the questions on my alternate test.. ive been doing this for hours! gotta get caught up some how i guess! haha

akashdeepdeb · Answer

http://www.tutorsonnet.com/math_homework_help/number_theory/online_algebraic_identities_assignment_help_tutoring.htm