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Darlene wrote this proof of the identity (x + y)2 - (x - y)2 = 4xy. Which of the following is a justification for Step 3 of her proof? Step 1: (x + y)2 - (x - y)2 = (x + y)(x + y) - (x - y)(x - y) Step
answered
May 29, 2019
Mathematics
college
5
votes
139k
views
Which statement best describes relations between the United States and South Korea today?
answered
May 17, 2019
History
middle-school
4
votes
231k
views
How much of the earth is covered by land
answered
Mar 22, 2019
Biology
middle-school
2
votes
1.3k
views
A cylindrical container of three rubber balls has a height of 18 centimeters and a diameter of 6 centimeters. each ball in the container has a radius of 3 centimeters. find the amount of space in the container
answered
Dec 30, 2018
Mathematics
high-school
2
votes
103k
views
Divide 30 in the ration of 1:2
answered
Dec 17, 2018
Mathematics
high-school
4
votes
134k
views
Mi padre _____ afeita todos los días.
answered
Dec 4, 2018
Spanish
high-school
5
votes
68.8k
views
Compare endocrine glands and exocrine glands
answered
Nov 8, 2018
Biology
high-school
4
votes
187k
views
The correct name for organisms that are made up of more than one cell is multicellular organisms multiple-cell organisms many-celled organisms a bunch of cells organisms
answered
Sep 2, 2018
Health
middle-school
1
vote
62.6k
views
Which is not required for historical inquiry? analysis and interpretation finding once-classified documents formulating effective questions ongoing evaluation of evidence the collection of relevant facts
answered
Jul 26, 2018
History
high-school
4
votes
8.9k
views
The value of specific heat for copper is 390 j/kg⋅c∘, for aluminun is 900 j/kg⋅c∘, and for water is 4186 j/kg⋅c∘. part a what will be the equilibrium temperature when a 225 g block of copper at 235 ∘c
answered
Jan 6, 2018
Physics
college
3
votes
11.3k
views
“Longing” is another word for _________. a. zephyr c. nostalgia b. catalyst d. cinematography
answered
Nov 4, 2017
English
high-school
5
votes
197k
views
Blake is cutting a piece of rope until fourths if each piece is 16 inches long what is the length of the entire rope
answered
Jun 29, 2017
Mathematics
high-school
2
votes
130k
views
Why is Tom Robinson unable to use his left arm? A. He was born without the use of his left arm B. It was caught under a tractor when Tom was a child C. It got caught in a cotton gin D. He fell out of a
answered
Mar 11, 2016
History
high-school
3
votes
63.6k
views
How do i correctly say " I have a big family
answered
Jan 27, 2015
Spanish
high-school
5
votes
153k
views
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