Question

If the roots of equation (b-c)x^2+(c-a)x+(a-b)=0 are equal then prove that 2b=a+c.

Answer 1

Answer:

Answer => (C)20&30

Step-by-step explanation:

Ok so Her it is,

Let the ratios be 2x and 3x respectively,

so,

\frac{2x+5}{3x+5} = \frac{5}{7}

3x+5

2x+5

=

7

5

so,

7(2x+5) = 5(3x+5)

14x + 35 = 15x + 25

14x - 15x = 25 - 35

-x = -10

x = 10

then thde numbers are 20 & 30 respectively..

Answer 2

plz refer to this attachment