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If x = 3, what is the value of 2x^2 - 5?

Practice Questions

Q1
If x = 3, what is the value of 2x^2 - 5?
  1. 1
  2. 7
  3. 10
  4. 11

Questions & Step-by-Step Solutions

If x = 3, what is the value of 2x^2 - 5?
Correct Answer: 13
  • Step 1: Start with the expression 2x^2 - 5.
  • Step 2: Substitute the value of x, which is 3, into the expression. This gives us 2(3^2) - 5.
  • Step 3: Calculate 3^2, which is 9.
  • Step 4: Now replace 3^2 with 9 in the expression. It becomes 2(9) - 5.
  • Step 5: Multiply 2 by 9, which equals 18.
  • Step 6: Now the expression is 18 - 5.
  • Step 7: Subtract 5 from 18, which gives us 13.
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