Random Sec 4 student's answer to Amanda's Secondary 3 A Maths Singapore question.
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x^2+2x+k
When k=1,
x^2+2x+1=(x+1)^2
as a^2+2ab+b^2=(a+b)^2
When k=1,
x^2+2x+1=(x+1)^2
as a^2+2ab+b^2=(a+b)^2
Date Posted:
2 years ago
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