Question

The difference between the two numbers is 4 and the difference between their square is 40. Find the number

Answer 1

Answer....

let one of the number be x

according to the question

other number=x+4

- (x+4)² - x²= 40

x²+16+8x -x² =40[(a+b)²=a²+b²+2ab]

16+8x = 40

8x=40-16

8x=24

x=24÷8

x=3

other number=x+4=3+4=7

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