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secondary 3 | A Maths
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Jwong
Jwong

secondary 3 chevron_right A Maths chevron_right Singapore

Help me solve for x
The answer is -1 but no matter how I do it, I'm still not able to get that answer
Please show me the working to get -1 and spot my mistake
Thanks you

Date Posted: 5 months ago
Views: 21
Mathaddict100
Mathaddict100
5 months ago
You're right but you didn't continue because you expect the table to have -1 value but it turns out to be 1..Right?..The two values on the table are infact the products(factorised forms of the equation)..There are not the values of x.
Jwong
Jwong
5 months ago
@Mathaddict100 OMG THANK U SO MUCH!!!
Mathaddict100
Mathaddict100
5 months ago
Wait,you forgot to add a negative sign for 4 on the table..
Jwong
Jwong
5 months ago
Yup, I already solved it, THANKS A BUNCH!!
Mathaddict100
Mathaddict100
5 months ago
Nice..Your welcome :)

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Kate
Kate's answer
3 answers (A Helpful Person)
1st
Instead of putting -4 for your cross factorisation, you put 4 and 4x+X does not give you -3x. -4x plus x with give you -3x