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if x=3 what is the value of x^2+x-3?

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To find the value of the expression \( x^2 + x - 3 \) when \( x = 3 \), we substitute \( 3 \) for \( x \):

\[ x^2 + x - 3 = 3^2 + 3 - 3 \]

Calculating this step-by-step:

  1. Calculate \( 3^2 \): \[ 3^2 = 9 \]

  2. Add \( 3 \): \[ 9 + 3 = 12 \]

  3. Subtract \( 3 \): \[ 12 - 3 = 9 \]

Therefore, the value of \( x^2 + x - 3 \) when \( x = 3 \) is \( 9 \).