Question

Find the value of polynomial for x=1: 2x-2x^3+7​

Answer 1

Let's solve your equation step-by-step.

$\tt x=(1)(2)x−2x3+7$

$\tt x=−2x3+2x+7$

Step 1: Subtract -2x^3+2x+7 from both sides.

x−(−2x3+2x+7)=−2x3+2x+7−(−2x3+2x+7)

$\tt 2x3−x−7=0$

Step 2: Use cubic formula.

$\tt x=1.627889$

Answer:

$\tt x=1.627889$

★$\cal\color{red}{Hope/ it /helps}$★

Answer 2

Answer

1. substitute x=1 in 2x-2x³+7

2(1)-2(1)³+7=2-2+7= 7

therefore value of polynomial when x=1 is 7

I hope it helps

:)