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Find the value of x , if 25 x=536^2-136...

Find the value of `x` , if `25 x=536^2-136^2`

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Given:
`=> 25 x=536^2-136^2`

using identities `(a^2-b^2)=(a-b)` `=> 25x=(536-136) (536+136)`
`=> 25x=(400) (672)`
`=> 25x= 268800`
`=> x= 268800/25`
`=> x= 10752`
...
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