Question

find the value of:
1)
$2 {x}^{4} - 3x + 1 \: when \: x = 3$
​

Answer 1

Answer:

x = 3

${2x}^{4} - 3x + 1$

$2 {(3)}^{4} - 3(4) + 1$

$2(81) - 12 + 1$

$162 - 12 + 1$

$150 + 1$

$151$

Ans. 151

Hope it helps.

Answer 2

Given: $2x^{4} -3x+1$and$x=3$

As we know that the value of $x$is given.

So, by putting the value of $x$ in the above equation, we are solving the given equation.

• By using the Bodmas rule, we are solving the above equation.
• As we know that the Bodmas rule is used to remember the order of operations to be followed while solving expressions in mathematics.

Where,

$\begin{array}{l}\mathrm{B}=\text{brackets}\\\mathrm{O}=\text { order of powers or rules } \\\mathrm{D}=\text { division } \\\mathrm{M}=\text { multiplication } \\\mathrm{A}=\text { addition } \\\mathrm{S}=\text { subtraction }\end{array}$

We are solving in the following way:

We have,

$2x^{4} -3x+1$

$\Rightarrow 2\times3^{4} -3\times3+1\\\Rightarrow 2\times 81 -9+1\\\Rightarrow 162 -9+1\\\Rightarrow 154$

Hence, the value of the given equation is$154$.