Question

11 B)
(1) If (28 - x) is the mean proportional of (23 - x) and (19 - x) then find
the value of x.
3a? - 762
3a +7b
4
hole of​

Answer 1

Answer:

23−x

​

=

19−x

28−x

​

i.e., (23−x)(19−x)=(28−x)

2

x

2

−42x+437=784−56x+x

2

56x−42x=784−437

14x=347

x=

347/14

​

.

Step-by-step explanation:

Answer 2

Answer:

(28-x)^2=(23-x)(19-x)

or,784-56x+x^2=437-42x+x^2

x=347/14(Ans.)