haleywavy19 haleywavy19

20-01-2021
Mathematics

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9. What is the coefficient of y^2? in the expansion of (x + y)^2??

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jacobEwing jacobEwing

20-01-2021

Answer:

The coefficient of y² will be 1, which we can see when we expand the expression:

(x + y)²

= (x +y)(x + y)

= x² + xy + xy + y²

= x² + 2xy + y²

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