Question

Hii!!
Kindly explain this question.. : )

Answer 1

step 1st you assume no . be X
2nd then see what he want multiple, addition, subtraction
3rd now interchange ex. 26 is the digit then 6 is on one place and 2 tens place then we interchange their place value 2 to ones and 6th to 60 .
4th then add interchanged digit in given condition

Answer 2

Here is the Explanation of The Solution :

There are only 2 methods for solving this question,

And the first method is in the picture,

Taking One of the digit x and another digit as 12/x,

Because x*12/x = 12 (Product of the Digits),

And he wrote expanded form of the number,

Which is 10*x + 12/x,

And according to question he has added 36 and equalled it with Reverse number,

Both Methods have the same process but the only difference is Taking either 1 or 2 digits as variables,

Method 2 : *Taking both the digits as variables*

Let the Number be ab,

According to the Question,
a*b = 12 -------- (1)

Again, ATQ,
ab + 36 = ba,

=> 10a + b + 36 = ba ,

=> 9a + 36 = 9b,

=> Dividing both sides by 9,

=> a + 4 = b ---------(2)

Substituting (2) in (1),

=> (a) * (a+4) = 12,

=> a² + 4a = 12,

=> a² + 4a - 12 = 0,

Comparison :

Step 1 is same but with 1 variable,
He directly took b = 12/a and substituted there,

Step 2 is same adding 36 and equalling with Reverse,

Step 3 is same - Dividing with 9,

Step 4 is not required in Method 1, But step 4 in Method 2 is substituting (2) in (1),

Step 5 the Quadratic Equation,

In both methods we got same Quadratic Equations,

If you remember my previous answer, I got 2 Quadratic Equations with Method 2,

Similarly by Method 1 also, We can get 2 Quadratic Equations,

By doing this :

Let unit digit be x,
=> Ten's digit = 12/x,

Expanded form = 120/x + x,

And following the steps of Method 1,

Therefore : The Quadratic Equation is always the same but we can get 2,

Conclusion : If method 1 is hard follow method 2,

Hope you understand everything, If you still have any doubts, You can comment it or message me,

Have a great Day,

Thanking you,
Bunti 360 !..