Question
Question Evaluate \( 8 x^{2}+2 x+5 \), when \( x=7 \) Provide your answer below:
Ask by Guerrero Lowe. in the United States
Mar 08,2025
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Answer
When \( x=7 \), \( 8x^{2}+2x+5 = 411 \).
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To evaluate \( 8 x^{2}+2 x+5 \) when \( x=7 \), you substitute 7 for \( x \): \[ 8(7^{2}) + 2(7) + 5 \] Calculate \( 7^{2} \): \[ 7^{2} = 49 \] Then substitute: \[ 8(49) + 2(7) + 5 = 392 + 14 + 5 = 411 \] So, the final answer is \( 411 \).