Answer:
-a² + 2ab + b² is your answer, or C).
Step-by-step explanation:
b(a + b) -a (a - b)
Distribute b to (a + b), and -a to (a - b)
b(a + b) = ab + b²
-a(a - b) = -a² + ab
Simplify. Combine like terms.
(-a² + ab) + (ab + b²) = -a² + 2ab + b²
-a² + 2ab + b² is your answer, or C).
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By subtracting the water poured into the first two beakers from the available water we conclude that the water left for the third beaker is 0.9 liters.
<h3>How to find the water left for the third beaker</h3>
In this question we know that Karen has 3 liters of water and poured 0.7 liters into the <em>first</em> beaker, 1.4 liters into the <em>second</em> beaker and we can determine the water left for the <em>third</em> beaker by subtracted the water poured into the <em>first two</em> beakers from the available water. The available volume is:
V = 3 L - 0.7 L - 1.4 L
V = 0.9 L
By subtracting the water poured into the first two beakers from the available water we conclude that the water left for the third beaker is 0.9 liters.
To learn more on subtractions: brainly.com/question/4319655
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See attached picture of graph
Answer:
x=3y
Step-by-step explanation:
ATQ
(x+y):(x-y)=2
or, x+y=2x-2y (crossmultiply)
or, 0= 2x-x-2y-y
or, x- 3y=0
or, x=3y is required equation
