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Verify that x=3 is a zero …

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Verify that x=3 is a zero of the polynomial P(x)=2x^3-5x^2-4x+3

Posted by Safiya Memon 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 5 years, 11 months ago

Here we have function p(x) = 2x³ - 5x² - 4x + 3
By using remainder theorem, we get
$\therefore$ p(3) = 2(3)³ - 5 $\times$ (3)² - 4 $\times$ 3 + 3
= 54 - 45 - 12 + 3 = 0
$\because$ p(3) =0
Therefore, x = 3 is a zero of p(x).

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CBSE > Class 10 > Mathematics