Question

Find the value of x, in order that the points (x, 8), (- 4, 2) and (5, -1) are collinear.with slope formula not area formula​

Answer 1

Answer:

suppose that .

(X,8) , (-4,2) , (5,-1)

formula ..1/2[x1(y2-y3)+x2(y3-y1)+x3(y1-y2)] =0

1/2 [X(2-(-1)) +(-4)(-1-8)+5(8-2)] =0

1/2 [X(2+1)-4(-9)+5(6)] = 0

1/2[3x+36 +30] =0

1/2[3x+66] =0

3x+33 =0

3x = -33

X=33/-3

X=-11

X=11

because (-)

nhi mana jata hai