Algebra 1 Section 10'2 B

1
Algebra 1Section 10.2 B Multiplying Polynomials
Multiply.

• -3x5(2x2 x 6)
• -3x5(2x2) 3x5(- x) 3x5(- 6)
• -6x7 3x6 18x5

• -12x4(3y 2x)
• -12x4(3y) 12x4(2x)
• -36x4y 24x5

• 2
• 3

(12x3 6x 24)
2 (12x3) 2 (-6x) 2 (24)
3 3 3
8x3 4x 16
2

• (-2x 6)(-8x 7)
• -2x(-8x) 2x(-7) 6(-8x) 6(-7)
• 16x2 14x 48x 42
• 16x2 62x 42

• (x3 4)(5x3 4)
• x3(5x3) x3(- 4) 4(5x3) 4(- 4)
• 5x6 4x3 20x3 16
• 5x6 16x3 - 16

3

• (-6x 18)(2x - .5)
• - 6x(2x) 6x(- .5) 18(2x) 18(- .5)
• -12x2 3x 36x 9
• -12x2 33x 9

• (-3x 5)(-2x2 7x 9)
• -3x(-2x2) 3x(-7x) 3x(9) 5(-2x2)
  5(-7x) 5(9)
• 6x3 21x2 27x 10x2 35x 45
• 6x3 31x2 8x - 45

4
Find an expression for the area of the rectangle.
x 1
2x 3
Area (x 1)(2x 3) x(2x) x(3) 1(2x)
1(3) 2x2 3x 2x 3 2x2 5x 3
5
Find an expression for the area of the triangle.
Area (4x 2)(12x 10) 2
4x(12x) 4x(10) 2(12x) 2(10) 2
12x 10
48x2 40x 24x 20 2
48x2 64x 20 2
4x 2
48x2 64x 20 2 2
2
24x2 32x 10