\[ y(x) y'(x)-\sqrt {a y(x)^2+b}=0 \] ✓ Mathematica : cpu = 0.0234811 (sec), leaf count = 58
\[\left \{\left \{y(x)\to -\frac {\sqrt {a^2 \left (c_1+x\right ){}^2-b}}{\sqrt {a}}\right \},\left \{y(x)\to \frac {\sqrt {a^2 \left (c_1+x\right ){}^2-b}}{\sqrt {a}}\right \}\right \}\]
✓ Maple : cpu = 0.012 (sec), leaf count = 21
\[ \left \{ x-{\frac {1}{a}\sqrt {a \left ( y \left ( x \right ) \right ) ^{2}+b}}+{\it \_C1}=0 \right \} \]