How is this solved pls

Step-by-step explanation:

Using the rules of indices

That's

So we have

So we have

Let

We have

4y = 9y - 2

4y - 9y = - 2

- 5y = - 2

Divide both sides by - 5

But

Take logarithm to base 2 to both sides

That's

So we have

Using the rules of logarithms

That's

Rewrite the expression

That's

But

So we have the final answer as

Hope this helps you

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step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.