Answer:
-105
Step-by-step explanation:
Substituting is like "plug and chug", so we can plug in -2 into the expression and get , which simplifies into 21*-5, or -105.
2x - 8(5 + 3x) = 4(x + 1) Solve this equation step by step
2 answers:
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In mathematics, a rational number is any number that can be expressed as a ratio of two integers numbers, being a non-zero denominator.
Answers
-5 is rational because can be writen as -5/1
√11 is irrational because can't be written as a ratio.
2/3 is rational because is a ratio of two integer numbers.
0.5 is rational because can be written 1/2
√16 is rational because can be written 4/1
pi (π) is irrational because can't be written as a ratio
<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:
Now we can rewrite it as:
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: . In this case:
<u>In short, the answer is </u>