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Secondary 1 | Maths
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explain pls t-t
Date Posted: 3 years ago
Views: 268
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Expand the (x-y) ^2 which is (x-y) (x-y) =x^2-xy+y^2
X^2-xy+y^2=55
X^2-(13) +y^2=55
X^2+y^2-13=55-13
X^2+y^2=42
The answer is 42.
X^2-xy+y^2=55
X^2-(13) +y^2=55
X^2+y^2-13=55-13
X^2+y^2=42
The answer is 42.
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