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Zeros of a Polynomial

Question 6Is ...

Question

Question 6
Is 0.2 a root of the equation $x^{2}$ – 0.4 = 0? Justify your answer.

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Solution

No, since 0.2 does not satisfy the quadratic equation i.e. $(0.2)^{2}$ -0.4 = 0.04 – 0.4 $\neq$ 0.

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State whether the following quadratic equation have two distinct real roots. Justify your answer.
(iv)

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(5)
State whether the following quadratic equation have two distinct real roots. Justify your answer.
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State whether the following quadratic equation have two distinct real roots. Justify your answer.
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(x - \sqrt{2})^{2} - 2 (x + 1) = 0

(7)
State whether the following quadratic equation have two distinct real roots. Justify your answer.
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Zeros of a Polynomial

Standard X Mathematics

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