3 years ago

Multiply (x+y-3)(x+y+3)=____

Mathematics

2 answers:

vfiekz [6]3 years ago

8 0

(x+y-3)(x+y+3) = x^2+xy+3x+xy+y^2+3y-3x-3y-9 = -9+x^2+y^2+2xy

SCORPION-xisa [38]3 years ago

6 0

$(x+y-3)(x+y+3)=\\
(x+y)^2-9=\\
x^2+2xy+y^2-9$

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