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Mathematics 9 Online
ihatelifeFS420:

help

ihatelifeFS420:

(-x^2+2x+4)(x+3)

gingy57016:

\(-x^{3}-x^{2}+10x+12\)

ihatelifeFS420:

how do you solve though

gingy57016:

distribute 3 times

gingy57016:

combine like terms

ihatelifeFS420:

what

ihatelifeFS420:

@oliver69

ihatelifeFS420:

how do you multiply two polynomials

OLIVER69:

(−x^2+2x+4)(x+3) =(−x^2+2x+4)(x+3) =(−x^2)(x)+(−x2)(3)+(2x)(x)+(2x)(3)+(4)(x)+(4)(3) =−x^3−3x^2+2^x2+6x+4x+12 =−x^3−x^2+10x+12 When mulitplying polynomials First, multiply each term in one polynomial by each term in the other polynomial using the distributive law. Second add the powers of the same variables using the exponent rule. Then, simplify the resulting polynomial by adding or subtracting the like terms.

ihatelifeFS420:

can u show me so u would multiply -x^2*x?

OLIVER69:

Re-order terms so constants are on the left to \(-x^{2}x\) Then combine exponents to \(-x^{3}\) and that's your answer \(-x^{3}\)

ihatelifeFS420:

oh alright

ihatelifeFS420:

how do you add polynomials

OLIVER69:

Here's an example to help you understand in a way:

ihatelifeFS420:

why do you add the 3 and the 2

OLIVER69:

because they are like terms

ihatelifeFS420:

so you combine like terms first? and then what

OLIVER69:

After we combine like terms we add their coefficients

ihatelifeFS420:

alright and how do you factor polynomials

OLIVER69:

Factor out a GCF from each separate binomial. Then factor out the common binomial. Note that if we multiply our answer out, we do get the original polynomial. (that would be to check your work)

ihatelifeFS420:

alright Imma try it thank you I just don't get my math

OLIVER69:

That's alright. i'm here if you need any more help

ihatelifeFS420:

thank you can u give me an example of the factoring out a polynomial

OLIVER69:

You're welcome and there are three types... so he's an image

OLIVER69:

1 attachment
OLIVER69:

1 attachment
ihatelifeFS420:

so for the one with 2 terms you would just multiply the one term by the other ones

OLIVER69:

@ihatelifefs420 wrote:
so for the one with 2 terms you would just multiply the one term by the other ones
yes exactly

ihatelifeFS420:

@oliver69 wrote:
@ihatelifefs420 wrote:
so for the one with 2 terms you would just multiply the one term by the other ones
yes exactly
alr imma try

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