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# Day 3 subtracting polynomials

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### Day 3 subtracting polynomials

1. 1. AIM: Subtracting Polynomials Do Now Find the following perimeters. x+7 3x + 9 x+3 x+3 x2 + 3 x2 + 3 x+7 3x + 9 1
2. 2. 16x + 32 24x + 10 ­27x2 ­ 25x ­ 6 26x2 + 22x + 25 ­15x2 ­ 21x ­ 11 2
3. 3. 32x2 + 31x + 28 ­9x2 ­ 14 6x2 ­ 32x ­ 15 20x7 ­ 16x6 ­ 21x5 ­ 23x4 + 9x ­9x7 + 5x6 + 9x3 ­ 20x2 ­ 12x 3
4. 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. 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. 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
7. 7. Subtract the following polynomials. 1.) (2x2 - 4) - (x2 + 3x - 3) 7
8. 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. 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
10. 10. Mr. Tjersland's Math 7 Homework: None 10