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[tex] \sf{\qquad\qquad\huge\underline{{\sf Answer}}} [/tex]

Let's evaluate ~

[tex]\qquad \sf  \dashrightarrow \: 2 {x}^{2} - 1[/tex]

plug in the value of x :

[tex]\qquad \sf  \dashrightarrow \: 2(3) {}^{2} - 1[/tex]

[tex]\qquad \sf  \dashrightarrow \: 2(9) - 1[/tex]

[tex]\qquad \sf  \dashrightarrow \: 18 - 1[/tex]

[tex]\qquad \sf  \dashrightarrow \: 17[/tex]

The required value is 17

igoroleshko156

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Answer:  [tex]\textsf{Option B, 17}[/tex]

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Given:  [tex]\textsf{2x}^2\textsf{ - 1}[/tex]

Find: [tex]\textsf{When x = 3}[/tex]

Solution: In order to find the value when x is equal to 3 we just need to equate any x to the value of 3 and simplify.

Plug in the values

  • [tex]\textsf{2x}^2\textsf{ - 1}[/tex]
  • [tex]\textsf{2(3)}^2\textsf{ - 1}[/tex]

Simplify the expression

  • [tex]\textsf{2(3 * 3) - 1}[/tex]
  • [tex]\textsf{2(9) - 1}[/tex]
  • [tex]\textsf{18 - 1}[/tex]
  • [tex]\textsf{17}[/tex]

Therefore, the answer that would make most sense would be option B, 17.

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