Question

If (7-x),(12-x) and (18-x) are in continued proportion then the value of x is ____
​

Answer 1

Answer:

$x = - 18$

Step-by-step explanation:

(7-x),(12-x),(18-x) are in continud proportion

b^2=ac

:.(12-x)^2 = (7-x) (18-x)

:.144- 24x + x^2 =126- 25x +x^2

:. -24x +25x =126-144

x =-18