find the value of expression 3x²+ax-7 is divisible by (x-1)?
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find the value of expression 3x²+ax-7 is divisible by (x-1)?
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IF THE EXPRESSION IS DIVISIBLE BY(x-1)
THEN,
f(x)=(the exp)
f(1)=3(1)sq+a(1)-7
=3+a-7
=-4+a //should be equal to 0
THEREFORE,
=-4+4 //substitute a=4
=0
hence the value of a is 4 only IF THE EXPRESSION IS DIVISIBLE BY(x-1)
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