14 pints. You multiply by 2. :-)
Since we want it in the form: (x - a)², let's first expand (x - a)² and then equate for the coefficients.
(x - a)² = x² - 2ax + a²
x² + 4x - 15 = x² - 2ax + a²
Now, let's focus on the middle term.
4x = -2ax
4 = -2a
a = -2
Thus, we know that a = -2
Then, we can say (x + 2)² = x² + 4x - 15
x² + 4x + 4 = x² + 4x - 15
Thus, 19 units are needed in order to complete the square to produce:
(x + 2)²
X(30;0)
y(0;50)
substitue 0 for y and solve for x
substitute 0 in for x and solve for y
X > -2....................
Answer:
3/2 g.oogle if you want the explanation of your work.
