Adding Polynomials
(x+2) + (x+3)
2x + 5
(x + 5) - (x + 2)
3
(x)(2x)
2x2
Evaluate: find the value of x+2 when x=3
3 + 2 = 5 so result is 5
(2x + 1) + (3x + 4)
5x + 5
(4x + 3) - (2x + 1)
2x + 2
(x+2)(3)
3x + 6
Evaluate: find the value of 2x + 1 when x=2
2(2) + 1 = 5 so result is 5
(4x2 + x) + (3x2 + 2x)
7x2 + 3x
(5x2 + 2x) - (3x2 + x)
2x2 + x
(x+2)(x+1)
x2 + 3x + 2
Area (basic): a rectangle has length x and width 2. Write the area expression
Hint: area = (l)(w)
Area: (x)(2) = 2x
(5x2 + 2x + 1) + (x2 + 3x + 4)
6x2 + 5x + 5
(6x2 + 4x + 3) - (2x2 + x + 1)
4x2 + 3x + 2
(2x+1)(x+3)
2x2 + 7x + 3
Combine and Evaluate: If the total apples are (x+3) and you add 2 more, write and evaluate when x=1
Expression: (x+3) + 2; when x=1: (1+3) + 2 = 6 so result is 6
(3x2 + 4x + 2) + (2x2 - x + 5)
5x2 + 3x + 7
(3x2 + 5x + 4) - (x2 + 2x + 6)
2x2 - 3x - 2
(x+4)(x+5)
x2 + 9x + 20
Simple revenue: Each item sells for x dollars. Selling 3 items gives revenue expression. Evaluate when x=4
Revenue Expression: 3x; when x=4: 3(4) = 12 so result is 12