1.

If `x-2`is a factor of each of the following twopolynomials, find the values of `a`in each case.`x^3-2a x^2+a x-1``x^5-3x^4-a x^3+3a x^2+2a x+4`

Answer» (x-a) is factor of f(x)
f(a)=0
`f(x)=x^3-2ax^2+ax-1`
`f(2)=0`
`2^3-2a2^2+a*2-1=0`
`8-8a+2a-1=0`
`a=7/6`
`g(x)=x^5-3x^4-ax^3+2ax+4`
`g(2)=0`
`32-48-8a-12a+4a+4=0`
`-16a-12=0`
`a=-3/4`.


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