Question

1. Find the value of the polynomial 5x - 4x2 + 3 at
x=-1 , X= 0, X=2


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Answer 1

Answer:

value of the polynomial at x=0 is -5

value of the polynomial at x=2 is 5

value of the polynomial at x=-1 is -10

Answer 2

$Let \: p(x) = 5x - 4x^{2} + 3$

$i ) If \: x = -1 \:then \\value \: of \: p(-1) = 5(-1)-4(-1)^{2}+3 \\= -5 - 4 + 3 \\= -9 + 3 \\= -6$

$ii ) If \: x = 0 \:then \\value \: of \: p(0) = 5(0)-4(0)^{2}+3 \\= 0 - 0+ 3 \\= 3$

$iii) If \: x = 2 \:then \\value \: of \: p(2) = 5(2)-4(2)^{2}+3 \\= 10 - 16 + 3 \\= -6+ 3 \\= -3$

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