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Q.

For the quadratic equation X 2 −7X−18=0  , the root values of X= 3 ,−2,4   satisfies the equation.


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a

True

b

False

answer is B.

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Detailed Solution

Let the quadratic equation be X 2 −7X−18=0  .
Solve the above equation by grouping, we get
X 2 −9X+2X−18=0 X(X−9)+2(X−9)=0 (X+2)(X−9)=0 X=−2,9  
Therefore, the values 3   and 4   is not a root of the equation.
Hence, the correct option is 2. Hence, the given statement is false.
 
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