1.5 Quadratic Equations

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1.5 Quadratic Equations
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WARM-UP

• Factor
• x2 20x 100 x2 12x 36
• x2 24x 144 x2 16x 64
• Solve 2x2 6x - 3 5x 3
• Which homework questions do you need help with???
• Write the numbers here

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Factor these
(x5)(x5) (x5)2 (x-7)(x-7)
(x-7)2 (x-10)(x-10) (x-10)2

• x2 10x 25
• x2 - 14x 49
• x2 20x 100

PERFECT SQUARE TRINOMIALS!!!
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Complete the Square (visual)
x2 8x
x2 8x______
16
(x4)2
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TRY TO COMPLETE THE SQUARE

• 32 (x3)2
• 92 (x9)2
• 62 (x6)2

• x2 6x ________
• x2 18x ________
• x2 12x ________

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Completing the Squareas described in the
textbook.

• If x2 bx is a binomial, then by adding (b/2) 2,
  which is the square of half the coefficient of x,
  a perfect square trinomial will result.
• That is, x2 bx (b/2)2 (x b/2)2

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Applying the idea to SOLVING QUADRATIC EQUATIONS
x2 16 x2 25 (x5)2 36
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ActivitySee if you can put the problem in
order.
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CHECK ANOTHER GROUPS WORK USING STICKY NOTESIf
you agree, write OK on your sticky note.If
you disagree, give them a sticky note indicating
the changes youd make.
Activity
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PracticeWorksheet 2 4
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Harder problemsWorksheet 9-10
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HOMEWORK PROBLEMS 1-15, skip 10
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DAY 2 What if it doesnt divide evenly.