When H = -5 the parabola will go right.
You would do 3in + 6 in then multiply 6 by 3.14 to get the diameter then add that to your original sum
X-3<-9
x<-6, x∈(-∞;-6)
x+5≥10
x≥5, x∈[5;+∞)
(-2m + 5n)²
(-2m + 5n) (-2m + 5n)
-2m(-2m + 5n) + 5n(-2m + 5n)
4m² - 10mn - 10mn + 25n²
4m² - 20mn + 25n²
4m²⇒ -2m * -2m
-20mn ⇒ 2(-2m)(5n)
25n² ⇒ 5n * 5n
<span>C. 4m² − 20mn + 25n²; a perfect square trinomial</span>