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Question 1-16

An equation is shown.
x² + 18x + 7 = 4
Enter a number in each box to rewrite the equation into an equation of the form (x − p)² = q.
1
(x-
²=0

User DGreen
by
6.7k points

1 Answer

4 votes

Answer:

Explanation:

To rewrite the equation x² + 18x + 7 = 4 in the form (x - p)² = q, we need to complete the square by adding and subtracting a constant term.

First, we subtract 4 from both sides of the equation:

x² + 18x + 7 - 4 = 0

Simplifying, we get:

x² + 18x + 3 = 0

To complete the square, we need to add and subtract the square of half the coefficient of x, which is (18/2)^2 = 81:

x² + 18x + 81 - 81 + 3 = 0

Simplifying, we get:

(x + 9)² - 78 = 0

Now, we can rewrite the equation in the desired form by adding 78 to both sides:

(x + 9)² = 78

Therefore, the values to be entered in the boxes are:

1: (x + 9)

2: 78

User Gustavo Vargas
by
7.4k points