1. 7.4 Adding and Subtracting Polynomials
(4x2 – 3y2 + 5xy) – (8xy + 6x2 + 3y2)
Distribute the negative and clear the parentheses.
4x2 – 3y2 + 5xy – 8xy – 6x2 – 3y2
Combine Like Terms
-2x2 – 3xy – 6y2

2. You can add/subtract vertically as well.
Try These
You can add/subtract vertically as well.
(+)
Distribute the negative - + -
(-)

3. Perimeter Perimeter is the distance around an object.
If P = 7x2 + 6x + 10, then find the 3rd side.
2x2 + 3x
4x2 + 2x - 4

4. Try These (4y + 5) + (-7y – 1) Answer: -3y + 4
(2w2 – 3w + 1) – (2w + 7)
Answer: 2w2 – 5w – 6
(4m2 – 3m + 10) + (m2 + m – 2)
Answer: 5m2 – 2m + 8
(8x2 + x – 6) – (-x2 + 2x – 3)
Answer: 9x2 – x - 3

5. Try These Page 386 #5-9 Homework #51
p all, 29-30, 36, 41, 42