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9.1 Algebra Review (Factoring and Radicals) EXPORT.notebook February 05, 2016
Mental Floss Monday, Feb 1st
Given the numbers: 1 2 4 71 = 2 = 3 = 4 =5 = 6 =7 =8 =
9 =10 =11 = 12 =13 = 14 =15 =16 =
9.1 Algebra Review
• Simplifying Radicals
• Solving Quadratic Equations
• Factoring
9.1 Algebra ReviewRadicals = Square Roots3 Rules for Simplifying Radicals:1. No perfect square factors inside the radical
2. No fractions inside the radical
3. No radicals in the denominator
Ex:
Ex:
Ex:
9.1 Algebra Review (Cont.)
1. No perfect square factors inside the radical
• Product:
Operations with Radicals
• You can only add radicals with the same number inside the square root
9.1 Algebra Review (Cont.)
• Solving Quadratic Equations
9.1 Algebra Review (Factoring and Radicals) EXPORT.notebook February 05, 2016
9.1 Homework
9.1 p.368 #112
Part 1 due Tues 2/2: #1,2,46
Part 2 due Wed 2/3: #3,7,9,12
Part 3 due Thur 2/4: #8,10,11
Operations with Radicals
• You can only multiply radicals with other radicals, and numbers in front of radicals by other numbers in front of radicals.
9.1 Algebra Review (Cont.)
2. No fractions inside the radical
9.1 Algebra Review (Cont.)
3. No radicals in the denominator
9.1 Homework
9.1 p.368 #112
Part 1 due Tues 2/2: #1,2,46
Part 2 due Wed 2/3: #3,7,9,12
Part 3 due Thur 2/4: #8,10,11
Find the perimeter of a rhombus with diagonals of lengths 16 and 20. Give your answer in reduced radical form.
Mental Floss Wednesday, Feb 3rd
9.1 Algebra Review (Factoring and Radicals) EXPORT.notebook February 05, 2016
Solving Quadratic Equations
x2 = c
x2 and constant (no x term)
ax2 + bx=0
x2 and x (no constant)
ax2 + bx + c=0
x2, x, and constant(All 3 terms)
Example Example Example
2x2 + 3x 5 = 02x2 + 8x = 0x2 = 25
Square root both sides of the equation, making sure to include +/.
Divide out a common factor, then set each part equal to 0.
Factor by splitting the polynomial into 2 parenthesis, then set each equal to 0.
x2 = 25
x = ±5
2x2 + 8x = 02x(x+4) = 02x=0 x+4=0x=0 x=4
2x2+3x5 = 0(2x+5)(x1) = 02x+5=0 x1=0x=5/2 x=1
1. Factor
2. Factor and solve
3. Factor and solve
4. Factor and solve
5. Solve
6. Solve
9.1 Homework
9.1 p.368 #112
Part 1 due Tues 2/2: #1,2,46
Part 2 due Wed 2/3: #3,7,9,12
Part 3 due Thur 2/4: #8,10,11
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