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secondary 4 | A Maths
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Chowder
Chowder

secondary 4 chevron_right A Maths

I need explaination . Why do i have to use substitution method for the last question? My teacher said the last question is a bit diff from the rest but how to know when to use substitution and why not to use? Please help me explain?

Date Posted: 7 years ago
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Aaron
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Chowder
Chowder
7 years ago
Oh ok . But i will only use the substitution method if the question resemble a quadratic equation right ? If it does not resemble then i can solve it using log as per normal?
Chowder
Chowder
7 years ago
If the form doesnt resemble a quadratic equation i dont need to use substitution right?