Question

Find the Value of the polynomial 5x – 4x2

+ 3 at

i) x = 5 ii) x = -2 iii) x = 4​

Answer 1

Answer:

3

Step-by-step explanation:

let

p(×)=5×-4×(0)2+3

=0-0+3

3

Answer 2

Step-by-step explanation:

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

$for \: x = 5$

$p(5) = - 4(5) {}^{2} + 5(5) + 3$

$p(5) = - 4 \times 25 + 25 + 3$

$p(5) = 72$

$for \: x = - 2$

$p( - 2) = - 4( - 2) {}^{2} + 5( - 2 ) + 3$

$p( - 2) = - 4 \times 4 - 10 + 3$

$p( - 2) = - 26 + 3$

$p( - 2) = - 23$

$for \: x = 4$

$p(4) = - 4(4) {}^{2} + 5 \times 4 + 3$

$p(4) = - 41$