19.5 in difference
difference indicates that you'll be subtracting so 29 3/4 - 10 1/4 = 19.5
<span>written in standard form
</span><span>
7.12 x 10^-3 = 0.00712
hope it helps</span>
We have 3⁴ = 81, so we can factorize this as a difference of squares twice:
Depending on the precise definition of "completely" in this context, you can go a bit further and factorize as yet another difference of squares:
And if you're working over the field of complex numbers, you can go even further. For instance,
But I think you'd be fine stopping at the first result,