Question by Donald Trump - Discuss with MathYouLike

Donald Trump

20/03/2017 at 11:22

It is given \(\dfrac{ab}{a+b}=8\). The value of (a+b) is a square number. Find a and b.

Square Number

List of answers

»ﻲ†hïếu๖ۣۜGïลﻲ« 25/03/2017 at 19:06

We have : ab = 8(a + b)

=> 10a + b = 8a + 8b

=> 10a - 8a = 8b - b

=> 2a = 7b

=> a = 7 ; b = 2

So ab is 72
Trịnh Đức Phát 22/03/2017 at 20:43

We have : ab = 8(a + b)

=> 10a + b = 8a + 8b

=> 10a - 8a = 8b - b

=> 2a = 7b

=> a = 7 ; b = 2

So ab is 72
→இے๖ۣۜQuỳnh 22/03/2017 at 20:20

We have : ab = 8(a + b)

=> 10a + b = 8a + 8b

=> 10a - 8a = 8b - b

=> 2a = 7b

=> a = 7 ; b = 2

So ab is 72
Love people Name Jiang 20/03/2017 at 17:14

We have : ab = 8(a + b)

=> 10a + b = 8a + 8b

=> 10a - 8a = 8b - b

=> 2a = 7b

=> a = 7 ; b = 2

So ab is 72
In the name of love 20/03/2017 at 15:26

ab= 8(a+b)

10a+b=8a+8b

2a=7b

=> a=7 ; b=2

so : a=7;b=2
Nguyễn Ngọc Mai 20/03/2017 at 20:36

ab = 8.( a + b )

=> 10a + b = 8a + 8b

=> 10a = 8b - b

=> 2a = 7b

=> a = 7 ; b = 5

ab is 72

1 l i k e !
FA KAKALOTS 19/02/2018 at 20:52

We have : ab = 8(a + b)

=> 10a + b = 8a + 8b

=> 10a - 8a = 8b - b

=> 2a = 7b

=> a = 7 ; b = 2

So ab is 72
No Name 26/03/2017 at 13:02
a = 7 ,b =2

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