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

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True

False

answer is B.

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Detailed Solution

Let the quadratic equation be

X 2 − 7 X − 18 = 0

.
Solve the above equation by grouping, we get

X 2 − 9 X + 2 X − 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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