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प्रश्न
`x^2=18x-77`
उत्तर
`x^2=18x-77`
`⇒x^2-18x+77=0`
`⇒x^2-(11x+7x)+77=0`
`⇒x^2-11x-7x+77=0`
`⇒x(x-11)-7(x-11)=0`
`⇒(x-7)(x-11)=0`
`⇒x-7=0 or x-11=0`
`⇒x=7 or x=11`
Hence, 7 and 11 are the roots of the equation `x^2=18xx77`
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