How do you factor 16d^2=4?

May 4, 2015

Generally speaking you don't "factor" an equation; you factor an expression.

In this case we can rearrange the equation to have an expression on one side and factor that expression:

$16 {d}^{2} = 4$

$16 {d}^{2} - 4 = 0$

$4 \left(4 {d}^{2} - 1\right) = 0$

$4 \left(d + 1\right) \left(d - 1\right) = 0$