if ( x+2) is a factor of x2+ax+2b and a+b=4 , then what will be the va

1.	if ( x+2) is a factor of x2+ax+2b and a+b=4 , then what will be the value of a
Answer» X+2=0Gives,x=-2Put in x2+ax+2b=0 as x+2 is a factor of the given eq. And remainder would be zero.Then after solving this we would get 2a-2b=4 or a-b=2 and we will asume it as eq1Also other eq.has been given that is a+b=4 eq.2 Solving eq 1and 2 by elemination method a-b=2a+b=4Will give 2a=6a=6÷2Therefore,a=3

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