26-06-2017
Mathematics

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Find the product (x+y)(x-7y)

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pollyprouty pollyprouty

27-06-2017

(x + y)(x - 7y)

x times x = [tex] x^{2} [/tex]
x times -7y = -7xy
y times x = xy
y times 7y = 7y^2

Combine like terms -7xy + xy = -6xy

Answer: [tex] x^{2} [/tex] - 6xy + 7y^2

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