![20brooklyn22](/avatars/37004.jpg)
20brooklyn22
25.11.2021 •
Mathematics
What values of x satisfy
2
x
2
−
4
x
+
5
=
0
?
Solved
Show answers
More tips
- C Computers and Internet How to Set Up Internet on iPhone? Detailed Guide with Step-by-Step Instructions...
- F Family and Home How to Teach Your Child to Speak: Tips and Recommendations...
- P Philosophy Agnosticism: Opinion or Belief?...
- S Style and Beauty How to choose the best mascara for your eyelashes...
- F Food and Cooking Discover Delicious Recipes You Can Make with Ground Meat...
- C Computers and Internet Google Search Tips and Tricks: Everything You Need to Know...
- S Science and Technology Why is there no gravity on other planets?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
Answers on questions: Mathematics
- M Mathematics Angela is building a playground for his backyard. The playground blueprint says it has 2 in by 4 in rectangular base. The scale of the blueprint is 1/3 = 3 feet. If Angela is building...
- M Mathematics 4.5m + 8 - 2.3m - 3.5...
- M Mathematics Y = 2/3x - 8 solve for y state m = state b = graph and label...
- M Mathematics Plz it’s due in 5 min.........
- M Mathematics Which data sets (in graphic or table form) contain outliers? check all that apply....
- M Mathematics Omar is baking pound cakes he needs 2 cups of milk for each pound cake Omar has 36 cups of milk how many pound cakes can Omar make please help...
- M Mathematics 12, 21, 30 and 39 are the first four terms in a sequence Write an expression for the nth term of this sequence...
- M Mathematics Yes thats right. MORE TRIG :)...
- M Mathematics A line is drawn on a scatter plot, as shown below: A graph shows values till 10 on both x- and y axis with increments of 1.Dots are shown at 0.5, 7.5 and 1.8, 6.5 and 3, 6 and 4.4,...
- M Mathematics A table increased in price by 2/5. After the increase it was priced at £63. What was the original price of the table?...
Ответ:
Step 1: (x + y)2 - (x - y)2 = (x + y)(x + y) - (x - y)(x - y)
Step 2: (x + y)(x + y) - (x - y)(x - y) = (x2 + xy + xy + y2) - (x2 - xy - xy + y2)
Step 3: (x2 + xy + xy + y2) - (x2 - xy - xy + y2) = (x2 + 2xy + y2) - (x2 - 2xy + y2)
Step 4: (x2 + 2xy + y2) - (x2 - 2xy + y2) = x2 + 2xy + y2 - x2 + 2xy - y2
Step 5: x2 + 2xy + y2 - x2 + 2xy - y2 = 4xy
The justification for Step 3 of her proof is:
D. Distributive property