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Find the value of x , if 4x=98^2-88^2...

Find the value of `x` , if `4x=98^2-88^2`

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Given:
`=> 4x=98^2-88^2`
using identities `(a^2-b^2)=(a-b)(a+b)`
`=> 4x=(98-88) (98+88)`
`=> 4x=(10) (186)`
`=> 4x= 1860`
`=> x= 1860/4`
`=> x= 465`
...
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