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Do Now 5/6/10

Do Now 5/6/10. Take out HW from last night. Practice worksheet 11.2 Form C #1-22 all Copy HW in your planner. Text p. 732, #4-32 multiples of 4 Quiz Monday Sections 11.2 & 11.3. Homework Practice worksheet 11.2 Form C all. 17). 1). 9). 2). 18). 10). 3). 11). 19). 4). 12). 20).

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Do Now 5/6/10

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  1. Do Now 5/6/10 • Take out HW from last night. • Practice worksheet 11.2 Form C #1-22 all • Copy HW in your planner. • Text p. 732, #4-32 multiples of 4 • Quiz Monday Sections 11.2 & 11.3

  2. Homework Practice worksheet 11.2 Form C all 17) 1) 9) 2) 18) 10) 3) 11) 19) 4) 12) 20) 5) 13) 6) 21) 14) 7) 22) About 50 watts 15) 8) About 100 watts 16)

  3. Objective • SWBAT solve radical equations

  4. Section 11.3 “Solve Radical Equations” • An equation that contains a radical expression with a variable in the radicand is called a radical equation. • To solve a radical equation, you need to ISOLATE the radical on one side and then square both sides of the equation. If then If then

  5. EXAMPLE 1 Solve a Radical Equation What if???? Add 8 to each side. Divide each side by 2. Square each side, to get rid of the radical. No Real Solutions Simplify. Check solution. 0 = 0

  6. EXAMPLE 1 Try It Out Add 3 to each side. Divide each side by 12. Square each side, to get rid of the radical. Simplify. Check solution. 0 = 0

  7. EXAMPLE 2 Solve a Radical Equation Subtract 12 from each side. Divide each side by 4. Square each side, to get rid of the radical. Solve for x. Add 7 to both sides. Simplify Check. 28 = 28

  8. EXAMPLE 2 Try It Out… Subtract 7 from each side. Square each side, to get rid of the radical. Solve for x. Add 5 to both sides. Simplify Check. 12 = 12

  9. EXAMPLE 3 Solve a Radical Equation Square each side, to get rid of the radical. Solve for x. Simplify Check.

  10. EXAMPLE 3 Solve a Radical Equation Add radical 2x -1 to both sides, to isolate radicals. Square each side, to get rid of the radical. Solve for x. Simplify Check. 0 =0

  11. EXAMPLE 4 Solve a Radical Equation Check. Square each side, to get rid of the radical. Simplify Simplify Squaring both sides of the equation can result in a solution that is NOT true in the original equation. Such a solution is called an EXTRANEOUS SOLUTION. Factor. Solve for x.

  12. EXAMPLE 4 Solve a Radical Equation Check. Square each side, to get rid of the radical. Simplify Simplify Factor. Solve for x. Squaring both sides of the equation can result in a solution that is NOT true in the original equation. Such a solution is called an EXTRANEOUS SOLUTION.

  13. Homework Text p. 732, #4-32 multiples of 4 Guided Practice Text p. 732, #6, 9, 12,18, 33

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