Sum
Find the value of ‘a’, if (x – a) is a factor of x3 – ax2 + x + 2.
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Solution
left` f (x)=x^3-ax^2+x+2 `
it is given that (x-a) is a factor of f (x)
Remainder=`f(a)=0 `
`a^3-a^3+a+2=0 `
`a+2=0 `
`a=-2`
Concept: Factor Theorem
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