Question

Factor the expression below.

9x2 - 64

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

Answer 1

hint..
\[\LARGE 9=3^2\]
and \[\LARGE 64=8^2\]

now use this formula:
\[\LARGE a^2-b^2=(a-b)(a+b)\] ...

Answer 2

can you do it ?

Answer 3

nooo

Answer 4

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 \[3^{2}-8^{2}\] = \[(3-9)(3+9)\]

Answer 5

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

Answer 6

good example @Janex

Answer 7

... unless there should be(3-8) ...

anyway .. your answer is:

\[\LARGE (3x)^2-8^2=(3x-8)(3x+8)\]

Answer 8

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

Answer 9

:) typing mistake. :P