Tan Kok Siang's answer to Ascendas's Secondary 2 Maths Singapore question.
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(x+y)^2 = x^2 + 2xy + y^2
x^2 + y^2 = 20
2xy = 24/2 = 12
Therefore, (x+y)^2 = 20 + 12 = 32
x^2 + y^2 = 20
2xy = 24/2 = 12
Therefore, (x+y)^2 = 20 + 12 = 32
Date Posted:
3 years ago
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