The first one is 2x^2+2x-2
the second one is 2x^2-2x-2
the third one is 6h+6k
2000 smartphones and 1500 flip phones
4-3=1
1x500=500
500x4=2000
500x3=1500
4 + -1 1/3
Turn 4 into an improper fraction.
4/4 is equal to 12/3. We want both 4 and 1 1/3 to have the same denominator so that they could be subtracted from each other.
New question :
12/3 + - 1 1/3
Turn {-1 1/3} into an improper fraction.
(3 × 1) + 1 = 4/3
So, -1 1/3 = -4/3
Our new question :
12/3 + - 4/3
Simplify.
12/3 - 4/3 = 8/3
Turn into a mixed number.
2 2/3
~Hope I helped!~
Answer: 
Step-by-step explanation:
By the geometric mean theorem,
So, by the Pythagorean theorem,
