Answer:
<h2>x ∈ R</h2>
Step-by-step explanation:
|3x| ≥ 0
The absolute value of any number is non-negative. Therefore, x is any real number.
Trajectory should be defined by speed and weight of the object relative to the gravity by which it follows
Step-by-step explanation:
y = x² - 6x + k = (x + a)² = x² + 2ax + a², where a is a real constant.
By Comparing Coefficients, we have
2a = -6 and a² = k.
=> a = -6/2 = -3,
=> k = (-3)² = 9.
Hence the value of k must be 9.