if (x+1) is a factor of ax^2+x^2-2x+4a-9.find the value of a
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x+1 is factor so x=-1
a×(-1)^2+(-1)^2-2×-1+4a-9=0
a+1+2-9+4a=0
5a=6
a=5/6
a×(-1)^2+(-1)^2-2×-1+4a-9=0
a+1+2-9+4a=0
5a=6
a=5/6
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