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I`m working on adding polynomials.Does anybody know what 3 (3xsquared + 1x - 5)?
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Middle School Teacher
Your problem is 3 (3x^2 + 1x - 5).
In a case like this, what you need to do is multiply each part of the polynomial by 3.
3 (3x^2) = 9x^2
3 (1x) = 3x
3 (-5) = -15
So, you are left with this:
9x^2 + 3x - 15
Posted by cburr on May 12, 2009 at 11:49 AM (Answer #1)
High School Teacher
Seeing as how the question was answered already by the teacher above, I'll provide a calculator answer to the question with some explanations.
Your question: 3(3x^2 + x - 5)
= 3* (3x^2 + x -5)
by distributive property, you multiply 3 to all 3 the coefficients and constant.
A: 9x^2 + 3x - 15
On an SAT reasoning test, you might be asked to find the value of x (given that the question provided is in equation form) and knowing how to solve questions such as this one is the first step to solving actual test questions.
Posted by gatetochrist on May 17, 2009 at 5:16 PM (Answer #2)
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