3 years ago

Melody is solving the equation x +12=31. Find her mistake and correct it

Mathematics

2 answers:

harkovskaia [24]3 years ago

8 0

Answer:

You need to subtract 31 from 12 to get what x is. Melody added instead of subtracting.

Step-by-step explanation:

kati45 [8]3 years ago

7 0

I just see an equation hmmm could it be the x.

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Does anyone know this ?

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P(x)=x^3+2x^2-4x-8 how do you factor this polynomial function

Wewaii [24]

<h2>Steps:</h2>

So for this, I will be factoring by grouping. Firstly, factor x³ + 2x² and -4x - 8 separately. Make sure that they have the same quantity inside of the parentheses:

$p(x)=x^2(x+2)-4(x+2)$

Now we can rewrite it as:

$p(x)=(x^2-4)(x+2)$

However, we aren't finished factoring yet. The first factor, x² - 4, can be factored further using the difference of squares. The difference of squares goes by the formula here: $x^2-y^2=(x+y)(x-y)$ . In this case:

$x^2-4=(x+2)(x-2)\\p(x)=(x+2)(x-2)(x+2)$

<h2>Answer:</h2>

<u>In short, the answer is $p(x)=(x+2)(x-2)(x+2)\ \textsf{OR}\ p(x)=(x-2)(x+2)^2$ </u>

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3 years ago