The sum of the digits of a two- digit number is 6. When we interchange the digits, the new number is 18 less than the original number. Find the original number. pls explain step by step​

42

Step-by-step explanation:

S1 let a and b be the digits of the number

so a 2 digit number cab written as - 10×a + b

eg - 68 as 6×10 + 8

S2 ) according to ques

a + b = 6    - eqn 1

(10×a + b) - (10×b + a) = 18

9×a - 9×b = 18

a - b = 2   - eqn 2

S3)from eqn 1 and eqn 2

we get a = 4 and b = 2

hence number is 42

step-by-step explanation:

given expression is .

now we need to simplify the given expression .

we know that square root is equivalent to the power 1/2. so that means we can take half of the exponents to get the square root of given expression.

expanding that will give a very very large number so let's keep answer in exponent form.