Question -
Answer -
Given (1, -5), (-4, 5)and (╬╗, 7) are collinear
We have the conditionthat three points to be collinear, the area of the triangle formed by thesepoints will be zero. Now, we know that, vertices of a triangle are (x1,y1), (x2, y2) and (x3, y3),then the area of the triangle is given by,
тЗТ тАУ 50 тАУ 10╬╗ = 0
тЗТ ╬╗ = тАУ 5