Final answer:
To find the value of 'y to the second power + 4y + 3' when y=7, you substitute 7 into the equation and simplify to get 49 + 28 + 3, which equals 80.
Step-by-step explanation:
The student's question involves evaluating a quadratic expression when y=7. Specifically, the student needs to evaluate y² + 4y + 3 for the given value of y. Here is the step-by-step process:
- First, plug in the value of y into the equation: (7)² + 4*(7) + 3.
- Next, square the value of y: 49.
- Then, multiply 4 by y: 4*7 = 28.
- Finally, add all the terms together: 49 + 28 + 3 = 80.
So, when y=7, the value of the expression y² + 4y + 3 is 80.