Question

Find the value of the polynomial 2x - 2xcube + 7 using given values for
(i) x = 3
(ii) x = -1
(iii) = 0
For each of the following oluvil find n1
and in​

Answer 1

Step-by-step explanation:

$2x - 2 {x}^{3} + 7 \\ x = 3 \\ 2 \times 3 - 2 \times 3 {}^{3} + 7 = 6 - 54 + 7 \\ - 41$

$x = - 1 \\ 2 \times - 1 - 2 \times ( - 1) {}^{3} + 7 \\ = - 2 + 2 + 7 = 7$

$x = 0 \\ 2 \times 0 - 2 \times 0 + 7 = 7$