Question Evaluate $$ 8 x^{2}+2 x+5 $$, when $$ x=7 $$ Provide your answer below:

Question

UpStudy AI · Accepted Answer

1. Substitute $$ x=7 $$ into the expression:
   $$
   8(7)^2 + 2(7) + 5
   $$

2. Evaluate the exponent:
   $$
   7^2 = 49
   $$
   So the expression becomes:
   $$
   8 \times 49 + 2 \times 7 + 5
   $$

3. Perform the multiplications:
   $$
   8 \times 49 = 392 \quad \text{and} \quad 2 \times 7 = 14
   $$
   Now the expression is:
   $$
   392 + 14 + 5
   $$

4. Add the values together:
   $$
   392 + 14 + 5 = 411
   $$

Thus, the evaluated expression is $$ 411 $$.
When $$ x=7 $$, $$ 8x^{2}+2x+5 = 411 $$.

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