Factor the expression below.

9x2 - 64

Which of the following binomials is a factor of the expression?

Question

Factor the expression below. 

9x2 - 64 

Which of the following binomials is a factor of the expression?

anonymous · Answer

hint..
$$\LARGE 9=3^2$$
and $$\LARGE 64=8^2$$

now use this formula:
$$\LARGE a^2-b^2=(a-b)(a+b)$$ ...

anonymous · Answer

can you do it ?

anonymous · Answer

nooo

anonymous · Answer

What he's saying is you must use the formula 
so if you set a= 9 and b = 64 you need to square them right?
$$3^{2}= 9$$ and $$8^{2}= 64$$
then simply plug into the formula
to get $$3^{2}-8^{2}$$ = $$(3-9)(3+9)$$

anonymous · Answer

A.	3x - 16
 		B.	3x - 8
 		C.	3x - 4
 		D.	3x - 32

anonymous · Answer

good example @Janex

anonymous · Answer

... unless there should be(3-8) ...

anyway .. your answer is:

$$\LARGE (3x)^2-8^2=(3x-8)(3x+8)$$

anonymous · Answer

oh that sould be 8 thx @kreshnik its = (3-8)(3+8)

anonymous · Answer

:)  typing mistake. :P