Question

Find the value of the polynomial 5x – 4x2 + 3 at

(i) x = 0
(ii) x = – 1
(iii) x = 2

Give full explanation!​

Answer 1

$\huge \sf {\orange {\underline {\pink{\underline{Answer :-}}}}}$

Let$\rm{ p(x) = 5x – 4x2 + 3}$

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(i) $\rm{p(0) = 5(0) – 4(0)2 + 3 }$

$\rm{= 0 – 0 + 3 = 3}$

Thus, the value of

$\rm{5x – 4x² + 3 at x = 0~is ~3.}$

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(ii) $\rm{p(-1) = 5(-1) – 4(-1)2 + 3}$

$\rm{= – 5x – 4x2 + 3 }$

$\rm{= -9 + 3 = -6}$

Thus, the value of

$\rm{5x – 4x2 + 3 ~at~ x -1~ is~ -6.}$

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(iii) $\rm{p(2) = 5(2) – 4(2)2 + 3 }$

$\rm{= 10 – 4(4) + 3}$

$\rm{= 10 – 16 + 3 = -3}$

Thus, the value of

$\rm{5x – 4x2 + 3 at x = 2 is – 3.}$

${\huge{\underline{\small{\mathbb{\pink{HOPE\:HELPS\:UH :)}}}}}}$

Answer 2

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