Question

Solve for A; 2 times the square root of (a-1)=4 times the square root of a

Answer 1

\[\sqrt{a-1}=\frac{4\sqrt{a}}{2}\]
\[\sqrt{a-1}=2\sqrt{a}\]
squaring on both sides
\[(\sqrt{a-1})^2=(2\sqrt{a})^2\]
\[a-1=4a\]
now solve for a

Answer 2

ok thanks