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9 questions from this quiz
Equations involving an algebraic root
Isolate the surd
Square both sides
A quadratic equation
Not all roots may satisfy the equation
x=3x=3x=3 only
Substituting gives 3≠13 \ne 13=1
You can lose marks
3x+7=1+x\sqrt{3x+7}=1+x3x+7=1+x
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