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For which value of x is the equation undefined
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For which value of x is the equation undefined

For which value of x is the equation undefined-example-1
User GlassFish
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1. -7, 3 because when you factor x^2 +4x -21 you get (x-3)(x+7) meaning x is undefined for 3, -7
User Divyesh Rupawala
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