Sagot :
SOLUTION
- (x-5)² + (y-7)²=42
expand the binomials
- (x²-10x+25)+(y²-14y+49) = 42
re-arrange the terms
- x²+y²-10x-14y+25+49-42=0
combine like terms
- x²+y²-10x-14y+32=0
ANSWER
- x²+y²-10x-14y+32=0
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