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3 years ago

Parker simplified the expression y2-5 (y+y2+8y+16/y+4)-12 as shown below. Which statement best describes Parker's error?

Mathematics

2 answers:

alex41 [277]3 years ago

4 0

Answer:

he distributed -5 incorrectly

Orlov [11]3 years ago

3 0

Answer:

D one Edge 2021 ;))

Step-by-step explanation:

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Which of the following would best be solved using factoring the difference of squares? 2² + 3x - 10 = 0 O 3r² + 12x = 8 2³ +52²

IgorC [24]

Given: Different equations

To Determine: Which would be best solved using difference of two squares

Solution

The factorization of a difference of two squares is given below

$a^2-b^2=(a-b)(a+b)$

Let us examine each of the given equation

$\begin{gathered} x^2+3x-10=0 \\ x^2-2x+5x-10=0 \\ x(x-2)+5(x-2)=0 \\ (x-2)(x+5)=0 \end{gathered}$ $\begin{gathered} 3x^2+12x=8 \\ 3x^2+12x-8=0 \end{gathered}$ $\begin{gathered} x^3+5x^2-9x-45=0 \\ x^2(x+5)-9(x+5)=0 \\ (x+5)(x^2-9)=0 \\ x^2-9=x^2-3^2=(x+3)(x-3) \\ Therefore \\ (x+5)(x+3)(x-3)=0 \end{gathered}$ $\begin{gathered} x^2-25=0 \\ x^2-5^2=0 \\ (x+5)(x-5)=0 \end{gathered}$

From the above,

$\begin{gathered} x^3+5x^2-9x-45=0 \\ AND \\ x^2-25=0 \end{gathered}$

The two equation above can be solved by difference of two square, but the equation below is the easiest solved using differnce of two square

x² - 25 = 0

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Colin pays £721.45 a year on his car insurance.

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Step-by-step explanation:

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Nesterboy [21]

Answer:

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Answer:

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Step-by-step explanation:

And rounded to nearest number is 261.8 mi3 or answer b.

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3 years ago

What is the answer? im trying to figure it out and its hurting my head

Naya [18.7K]

7x-99=2x+1
5x=100
x=20

mark me brainliest if the answer is correct, thank you in advance :)

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3 years ago