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please show me how you did this

2006-07-23 12:48:29 · 8 answers · asked by Anonymous in Science & Mathematics Mathematics

8 answers

x-y=6 (1)
x^2-y^2=96
(x-y)*(x+y)=96
x+y=96/6=16 (2)
sum (1) and (2)
2*x=22
x=11
y=11-6=5

2006-07-23 14:46:05 · answer #1 · answered by Anonymous · 0 0

Let the numbers be x and y

x - y = 6 and x^2 - y^2 = 96

from the first equation x = y+6 and substituting this in the second equation we get, (y+6)^2 - y^2 = 96
y^2+12y+36 -y^2= 96
12y + 36 = 96
12y = 96-36 = 60
hence y = 5

Putting y = 5 in the first equation we get x = 11 and hence the two numbers are 5 and 11.

2006-07-24 00:30:51 · answer #2 · answered by Subhash G 2 · 0 0

This is simple. You know how to square the sum of two numbers? (a+b)^2 = a^2 + 2ab + b^2

Assume your integers are x and y. You know that x+6 = y already. So we solve for y by knowing that y^2 - x^2 = 96.

Applying our rule from above, (x + 6)^2 must be x^2 + 12x + 36 and it is equal to y^2.

y^2 - x^2 = 96 = 12x + 36.

Now subtract 36 from both sides: 96-36=60 and it must equal 12x.

Since 12x = 60 we can see that 60/12 = x.

Therefore, x=5, y=11. x^2 = 25, y^2 = 121. 121-96=25.

2006-07-23 20:16:18 · answer #3 · answered by aichip_mark2 3 · 0 0

11 and 5. trial and error. Started with 10 and 4 and the difference was less than 96, so I went up 1 and that was it.

2006-07-23 19:53:03 · answer #4 · answered by Nitris 3 · 0 0

x - y = 6
x^2 - y^2 = 96

x = y + 6
(y + 6)^2 - y^2 = 96
((y + 6)(y + 6)) - y^2 = 96
(y^2 + 6y + 6y + 36) - y^2 = 96
y^2 + 12y + 36 - y^2 = 96
12y + 36 = 96
12y = 60
y = 5

x = y + 6
x = 5 + 6
x = 11

The numbers are 5 and 11

2006-07-23 23:01:07 · answer #5 · answered by Sherman81 6 · 0 0

The difference of the two squares equals the product of their sum and difference. Use that fact to write an equation and make substitutions. That should get you started, others gave you the answer.

2006-07-23 20:14:44 · answer #6 · answered by Sqdr 3 · 0 0

11-5=6
5*5=25
11*11=121
121-25=96
Hope this helps

2006-07-23 19:53:24 · answer #7 · answered by Anonymous · 0 0

Can't you do your own homework? Does your mom have to wipe your butt too?

2006-07-23 19:57:32 · answer #8 · answered by gtoacp 5 · 0 0

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