factoring by using the difference of two squares formula
1-81z^2

Question

factoring by using the difference of two squares formula
1-81z^2

tkhunny · Answer

Well, do it.  $(What)^{2} = 1$ ?

Likewise.  $(What)^{2} = 81z^{2}$ ?

anonymous · Answer

don't know

anonymous · Answer

ok you can wtite this as (1-9z)(1+9z)

anonymous · Answer

is that fraction

kc_kennylau · Answer

@imfresh don't fool around please

tkhunny · Answer

@candyhuebner If you honestly cannot solve $(What)^{2} = 1$, then you cannot solve this problem and you are likely in the wrong class.  I would recommend you go have a very honest and very clear discussion with your academic advisor.

anonymous · Answer

The formula:
$$a^2-b^2 = (a-b)(a+b)$$

anonymous · Answer

$$1 - 81z^2 = a^2 - b^2$$
a^2 = 1
b^2 = 81z^2
The opposite of squaring a number is taking its square root.
a = sqrt(1)
b = sqrt(81z^2) = sqrt(81)sqrt(z^2)