Boy Mow Chau's answer to wrf's Secondary 3 A Maths Singapore question.
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if the equation has terms with a^(2x) and a^x ,
or a^x and a^(-x),
then you can solve as a quadratic equation.
use substitution u = a^x to make the working easier to read,
substitute back a^x at the end.
remember to check each answer to see if the answer is valid.
or a^x and a^(-x),
then you can solve as a quadratic equation.
use substitution u = a^x to make the working easier to read,
substitute back a^x at the end.
remember to check each answer to see if the answer is valid.
Date Posted:
4 years ago
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