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secondary 3 | A Maths
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Royal Lim
Royal Lim

secondary 3 chevron_right A Maths

How to do qn 5(a)?Needed help thanks

Date Posted: 6 years ago
Views: 246

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Arnold K H Tan
Arnold K H Tan's answer
2106 answers (A Helpful Person)
1st
Substitution is normally the fastest way. You can also expand and compare coefficients of x and x^0.
Royal Lim
Royal Lim
6 years ago
Thanks
Royal Lim
Royal Lim
6 years ago
Why subs x=2?I dun understand
Arnold K H Tan
Arnold K H Tan
6 years ago
Subst. Is short for substitute x = 2 into the equation. The idea being to eliminate a from the equation.
Royal Lim
Royal Lim
6 years ago
Ok now i understand
Royal Lim
Royal Lim
6 years ago
Thanks
Royal Lim
Royal Lim
6 years ago
I am sorry,what about subs x=0,i dun understand why sub 0
Arnold K H Tan
Arnold K H Tan
6 years ago
For the second valie, you can use any value of x other than 2, which was already used. X = 0 is easiest. Try with x=3 or some other value, for the second step (to find the value of a) and you will see.