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Charra [1.4K]
3 years ago
13

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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