A two digit Number is such that int ten's digit is the square of unit diget and the sum of the digi is 12
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let the ten's digit be x
units digit be y
x=3y
x-3y=0.....................1
10y+x=10x+y+36
9y-9x=36
/9
y-x=4......................2
add (1) & (2)
-2y=4
y=-2
x=3y
x=-6
The number is -62
units digit be y
x=3y
x-3y=0.....................1
10y+x=10x+y+36
9y-9x=36
/9
y-x=4......................2
add (1) & (2)
-2y=4
y=-2
x=3y
x=-6
The number is -62
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