Disguised Quadratic Equations

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Disguised Quadratic Equations
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What is to be learned?

• How to spot quadratic equations when they are
  disguised
• x2 - 3x 4 0

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• x (x 5) - 10
• Quadratic?
• However, breaking brackets
• x2 5x -10
• Quadratic Equation
• Must make equal to zero
• x2 5x 10
• Now factorise or
• Quadratic Formula

No x2
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Disguised Quadratic Equations

• Any equation with a squared term in it is a
  quadratic equation
• You may need to break brackets first
• Must get one side
• Then Factorise or

zero
use quadratic formula
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• n(2 3n) 12
• break brackets
• 2n 3n2 12
• one side zero
• 2n 3n2 12
• Put in order
• 3n2 2n 12 0
• Quadratic Formula Job

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