How do you solve the equation #9x^2+30x+25=11# by completing the square?
For starters, the
So the first step is to divide both sides by 9, giving:
For me, it makes some of the subsequent steps easier if we subract
Now remember how binomials are squared:
so, what we do is, add and subtract this to the left side of eq. 1:
...and now the first 3 terms of the left side are a perfect square:
...square root of both sides: