Question

Find the value of the polynomial 2x-2x3+7 using given values for x.
(i). x=9
(ii) x=-5
(iii) x=0​

Answer 1

Answer:

if x=9 then value is -1433

if x=-5 then value is 2507

if x=0 then the value is 7

Step-by-step explanation:

please make it brainliest answer

Answer 2

Answer:

$given \: 2x - 2 {x}^{3} + 7 \\ \\ 1) \: x = 9 \\ \\ = 2(9) - 2 {(9)}^{3} + 7 \\ \\ = 18 - 2 \times 729 + 7 \\ \\ = 18 - 1458 + 7 \\ \\ = - 1440 + 7 \\ \\ = - 1447$

____________________♡

$2) \: x = - 5 \\ \\ = 2( - 5) - 2 {(5)}^{3} + 7 \\ \\ = - 10 - 2 \times 125 + 7 \\ \\ = - 10 - 250 + 7 \\ \\ = - 260 + 7 \\ \\ = - 253$

_____________________♡

$3) \: x = 0 \\ \\ = 2(0) - 2 {(0)}^{3} + 7 \\ \\ = 0 - 0 + 7 \\ \\ = 7$

# keep smiling ☺