Final answer:
To simplify the expression (19-4)x² + 7, you subtract 4 from 19 to get 15, multiply it by x² to get 15x², and then add 7 to have the simplified expression of 15x² + 7.
Step-by-step explanation:
The question you've asked is related to simplifying a mathematical expression. To simplify (19-4)x² + 7, we first deal with the operation inside the parentheses. We subtract 4 from 19 to get 15. Then we multiply 15 by x² to get 15x². Finally, we add 7 to 15x² to get the simplified expression, which is 15x² + 7. This is your simplified expression.
If you want to evaluate this expression for a specific value of x, you would substitute that value in the place of x and perform the calculation. However, as it stands, this is as simplified as it gets without knowing the value of x.
Here's the step-by-step explanation:
- Begin with the expression (19-4)x² + 7.
- Subtract 4 from 19 to get 15.
- Multiply 15 by x², which gives you 15x².
- Add 7 to 15x², resulting in 15x² + 7.