Jee Main
Straight Lines And Pair Of Straight Lines
JEE Main 2023 (Online) 15th April Morning Shift
MCQ+4 / -12023
If $(\alpha, \beta)$ is the orthocenter of the triangle $\mathrm{ABC}$ with vertices $A(3,-7), B(-1,2)$ and $C(4,5)$, then $9 \alpha-6 \beta+60$ is equal to :