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Multiplying Polynomials. How do we find the area of a square?. The correct formula is written above. Use it to find the area of the square below. As we have already said, to find the area, we square the length of a side. .

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Presentation Transcript
slide3
The correct formula is written above.

Use it to find the area of the square below.

slide10
A=lw

A=(x+3)(x+1)

slide11
How do we get from (x+3)(x+1) to ?

We have already seen that 2(x+1) = 2x+2

We were able to do this multiplication by using the

distributive property. We can also use the

distributive property when we are multiplying

polynomials by polynomials.

slide12
We need to remember to distribute each

term in the first set of parentheses through

the second set of parentheses.

Example:

(X+3)(x+1)=(x)(x)+(x)(1)+(3)(x)+(3)((1)

let s work a few of these
Let’s work a few of these.

1.) (x+2) (x+8)

2.) (x+5) (x-7)

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

check your answers
Check your answers.

1.) (x+2) (x+8) = X2+10x+16

2.) (x+5) (x-7) = X2-2x-35

3.) (2x+4) (2x-3) = 4x2+2x-12

by learning to use the distributive property you will be able to multiply any type of polynomials
By learning to use the distributive property, you will be able to multiply any type of polynomials.

Example:(x+1)(x2+2x+3)

(x+1)(x2+2x+3) = X3+2x2+3x+x2+2x+3