Algebra I –Wilsen
Unit 8: Working with Polynomials
Day Two
Multiplying Two Binomials:
The Double Distributive Property
Example 1
Multiply the binomial x + 5 with the binomial x + 3.
Double dolphin method:
Box method:
BLOCK 2
Example 2
Multiply the binomial x – 2 with the binomial x – 3.
Double dolphin method:
Box method:
Example 3
Multiply the binomial x + 5 with the binomial x – 7.
Double dolphin method:
Box method:
Example 4
Multiply the binomial 3x – 5 with the binomial x + 2.
Double dolphin method:
Box method:
Multiply each pair of binomials by the double dolphin method.
1)
( x + 4 )( x + 7 )
2)
( x – 3)( x + 1)
3)
( x + 6 )( x – 3)
4)
( x + 10 )( x + 11)
Multiply each pair of binomials by using the box method
6)
( x + 2 )( 2x + 7 )
7)
( x + 5 )( 3x – 2 )
8)
( x – 9 )( 4x + 1)
9)
( x – 3)( x – 8 )