Why is completing the square called 'completing the square'?

Mathematics

1 answer:

seropon [69]4 years ago

8 0

Answer:

I'm not too sure, since I'm doing the same thing in math now too. I think it's since you're adding another number that is a perfect square in order to factor the quadratic equation.

Step-by-step explanation:

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How do you write an equation in standard form given point (2,2) (0,-4)

notka56 [123]

The point-slope form:

$y-y_1=m(x-x_1)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}$

We have the points (2, 2) and (0, -4). Substitute:

$m=\dfrac{-4-2}{0-2}=\dfrac{-6}{-2}=3\\\\y-2=3(x-2)$

The standard form:

$Ax+By=C$

$y-2=3(x-2)$ use distributive property

$y-2=3x-6$ add 6 to both sides

$y+4=3x$ subtract y from both sides

$4=3x-y$

<h3>Answer: 3x - y = 4</h3>

6 0

3 years ago

What is the answer to this problem

Elden [556K]

I think when you have a fraction like that, you multiply the denominator on both sides obviously by the first step

1 - 3x/5 = -7

Multiply on both sides
1 - 3x/5 * 5 = -7 * 5

and Solve
1 - 3x = -35

Subtract 1 from both sides of the equation
-3x = -36

Divide both sides by -3
-3x / -3 = -36 / -3 (← answer)
x = 12

Hope it helps

4 0

4 years ago

Find the unit cost of a store sells a dozen eggs for 1.99.

Charra [1.4K]

Answer: 0.16$

Step-by-step explanation: You would do 1.99 divided by 12 because 12 equals to a dozen, 1.99 divided by 12 to get 0.16 cents.

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4 years ago

What is SU? SU = 5 SU = 7 SU = 12 SU = 13

alex41 [277]

Answer:

SU=5 the first option.