Question

Solve using the square root method. 9x2 - 25 = 0

Answer 1

\[\LARGE 9=3^2\quad \quad , \quad \quad 25=5^2\]
\[\LARGE (3x)^2-5^2=0\]
now according to...
\[\LARGE a^2-b^2=(a-b)(a+b)\]
you have:
\[\LARGE (3x-5)(3x+5)=0\]
from here you have:
3x-5=0 or 3x+5=0

solve them.. you'll have the answer ;)

Answer 2

I get 1.6 and -1.6. Is that right?

Answer 3

Yes, that is correct. 1.6666... and -1.6666...