Mathematics - Point Question with Solution | TestHub

Let $A(-1,1)$ and $B(2,3)$ be two points and $P$ be a variable point above the line $AB$ such that the area of $△\mathrm{PAB}$ is 10 . If the locus of $\mathrm{P}$ is $\mathrm{a}x+\mathrm{b}y=15$, then $5\mathrm{a}+2\mathrm{b}$ is :