zero-product property

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  • To find the roots of a quadratic equation that can be factored, apply the Zero- Product Property.
  • I just don't get it!!
  • If the quadratic equation is x2-16=0 you have to find the square root of 16
  • The square root of 16 is 4
  • Yes so the factor would be..
  • (x+4)(x-4)=0?
  • Yes you're doing great! So if thats the factor then what are the roots?
  • Its ummm x=16 y=-4?
  • The x has to make the factors = 0
  • Nonono if the factors are (x+4)(x-4)=0
  • Yes! You got it! To get the factors to = 0 the value of x must be its opposite! (x+4) x=-4 (-4+4)=0
  • Yes so what roots would make 4=0 and - 4= 0?
  • x=-4 and x=+4?
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