in a two digit number the digit at the tens place is equal to the square of the digit at the tens place if 18 is added to the number the digits get interchanged numbers
sahilagrawal11:
actually there was mistake..
ok
but now you just replace first word tense by unit..
Bro, your answer is ready have a look of it
I'm so thankful of yours...
actually there is my exam on 11 March...
so than
Wishes you best of luck for your upcoming exames.
thanks bhai or I may call you sir too..thanks so much sir..
i'm just like your elder brother so, you can call be bro.
Answers
Answered by
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Heya
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Let the two digit number be xy
ACCORDING TO THE QUESTION
y = x²
10x + y +18 = 10y + x
=>
9x - 9y = -18
=>
y - x = 2
y = x² put this value of y in above equation we get
x² - x - 2 = 0
=>
x² - 2x + x - 2 = 0
=>
x ( x - 2 ) + 1 ( x - 2 ) = 0
=>
x = -1 OR x = 2
For x = -1 y = 1
For x = 2 y = 4
So, the two digit number is -11 OR 24
-11 will be rejected becoz when we interchange the digits they remain same.
So, the two digit number is 24
______________________________
Let the two digit number be xy
ACCORDING TO THE QUESTION
y = x²
10x + y +18 = 10y + x
=>
9x - 9y = -18
=>
y - x = 2
y = x² put this value of y in above equation we get
x² - x - 2 = 0
=>
x² - 2x + x - 2 = 0
=>
x ( x - 2 ) + 1 ( x - 2 ) = 0
=>
x = -1 OR x = 2
For x = -1 y = 1
For x = 2 y = 4
So, the two digit number is -11 OR 24
-11 will be rejected becoz when we interchange the digits they remain same.
So, the two digit number is 24
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