Question

The sum of two integers is 7 then subracted to the square of second integer from the first and the result is 21​

Answer 1

Answer:

X + Y = 7 (i)

X² - Y² = 21 (ii)

X² - Y² = 21

or, (x+y) (x-y) = 21

or, 7 × (x-y) = 21

or, (x - y) = 3

X + Y =7

X - Y = 3

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2X = 10

X = 5

X + Y = 7

or, 5 + Y = 7

or, Y = 2