Answer: 19
Explanation:
To solve this equation we need to substitute 2 with x, because we know they're equivalent. So now, our equation is:
2(2)²+5(2)+1
Now, using GEMDAS/order of operations, we have to do 2² first because exponents comes before multiplication.
2² is 4 and 2·4=8. 5·2=10.
Now we have 8+10+1 and using addition, we can simplify it to 19, therefore getting 19.
Hope that helped a lot. Let me know if you have any further questions.
:)