Question

when /AB/ √90 , find the value of m which points are (3,6) (7,m)​

Answer 1

Explanation:

The points are colliner if the area of triangle is 0.

0=

2

1

∣3(6−

2

15

)+m(

2

15

−5)+

2

1

(5−6)∣

0=3(

2

−3

)+m(

2

5

)−

2

1

0=−9+5m−1

10=5m⇒m=2