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Day 3 subtracting polynomials
- 4. (3x2 + x + 2) - (2x2 - x + 3)
REMOVED
PIECES
Use the opposite of each term
of the second polynomial
2 2 x x
x x 1 1
4
- 5. (3x2 + x + 2) - (2x2 - x + 3)
REMOVED
PIECES
x
2
1
x
2 2
x x
x
2 2
x x
11
1
1
2 2 x x
x x 1 1
5
- 6. (-x2 + 2x - 1) - (-x2 + 3x - 2)
REMOVED
PIECES
2
x
x x
1 x
2
x
x x
1
1
2 2 x x
x x 1 1
6
- 8. Subtract the following polynomials.
1.) (3a2 - 3a + 1) - (2a2 + 4a - 7)
2.) (-2x3 + 5x - 1) - (-2x + 6)
3.) (m2 + 2mn) - (3m2n - 6mn) - (5m2n + 12 mn)
4.) (3a2b2 + 2a2 - 5ab) + (-3ab + a2 - 2) - (6ab + 1)
8
- 9. BEFORE YOU LEAVE
The area of the rectangle is 2a2 - 4a + 5 cm2. The area of the
square is a2 -2a - 6 cm2. What is the area of the shaded region?
9