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Simplify: (5-x)(6-5x)(2-x)...

Simplify: `(5-x)(6-5x)(2-x)`

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`( 5 - x ) ( 6 - 5x ) ( 2 - x )`
`= ( 5 - x ) { ( 6 - 5x ) ( 2 - x ) }`
`= ( 5 - x ) { 6 ( 2 - x ) - 5x ( 2 - x ) }`
`= ( 5 - x ) { 12 - 6x - 10x + 5x^2}`
`= ( 5 - x ) ( 12 - 16x + 5x^2 )`
`= 5 ( 12 - 16x + 5x^2 ) - x ( 12 - 16x + 5x^2 )`
`= 60 - 80x + 25x^2 - 12x + 16x^2 - 5x^3`
`= 60 + 41x^2 - 92x - 5x^3`
Hence simplified.
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