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# Feb 19

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• 8. b =4, a = 12, h = 6; 2a/h = b
• 8. b =4, a = 12, h = 6; 2a/h = b
• 8. b =4, a = 12, h = 6; 2a/h = b
• 8. b =4, a = 12, h = 6; 2a/h = b
• 8. b =4, a = 12, h = 6; 2a/h = b
• 8. b =4, a = 12, h = 6; 2a/h = b
• 8. b =4, a = 12, h = 6; 2a/h = b
• ### Feb 19

1. 1. Notes:1. Thursday: Test on Polynomials. Adding, Subtracting, Multiplying and Dividing. 2. Still some tests to scan, both scores will be posted, lowest will be dropped3. Weekly Khan Academy grades to be posted. First 2 weeks of third quarter posted after Wednesdays 80% last chance.4. Reminder: New scoring schedule. 4 points for each correct answer, 8 consecutive is 100%. 7 out of 8 is28%. If you use a hint, you get no credit for that question.
2. 2. Warm-Up 1. 9 - 3(x + 2) 2.. Solve for a: 5 - ax = 15 + 3x3. Solve the systems of equations: 5x + 3y = 6 3x -2y = 54. Simplify: (2x2 - 3x + 4) + (x3 - 3x2- 5x + 2) 5. Multiply: (x - 5) (x + 7) 6. Factor: (15x6 + 9x5 - 12x4 + 3x3)
3. 3. Warm-Up7. x = 4 36 - x 5 8. 1 4x-10y14 9. Solve for b: A = ½b 10. Find the x and y intercepts: 2x -12 = 3y
4. 4. Khan Academy: Factoring Linear Binomials: 8x +20 6x +16 Multiplying Expressions: (x - 3) (-8x - 3) (3x +6)2 (-10x + 10) (-x - 10)Multiplying Polynomials: (6n3 - 5n2) (2n3 + 4n) (3x2) (3x3 + 2x)
5. 5. Dividing Polynomials Part I: Dividing by a Monomial: 1. Take each term in the numerator and divide by the denominator. The result is now a monomial divided by a monomial for each term. Solve as usual. 18x4 -10x2 + 6x7 2x2Part 2: Dividing by a Polynomial: (Long Division)We will divide x3 + x2 - 5x -2 by x- x-2 x3 + x2 - 5x -2; 2Step 1: Find the highest degree terms in both the divisor andthe dividend. In this case, that would be x and x3.
6. 6. Dividing Polynomials 3 2Place above the x2 inStep 2: Divide x by x. The result is: x the dividend x2 + 3x+ 1 x-2 x3 + x2 - 5x - Step 3: Multiply by the Divisor: 2 x3 - 2x2 3x2 - 5x -2 Step 4: Repeat the Process: 3x2 - 6x 3x2÷ x = x Step 5: Multiply by the Divisor: -2 x -2 0 Step 6: Last Division
7. 7. Dividing Polynomialsx-3 x2 - x + 6x-2 x2 - 4
8. 8. Class Work: