SOLUTION
1. x²+y² = 169
- (x-0)²+(y-0)²=13²
- Center (0,0) , radius = 13
2. (x-2)² + (y-4)² = 36
- (x-(2)²+ (y -(4))² = 6²
- Center (2,4) , radius = 6
3. x²+(y-6)² = 25
- (x-0)²+(y-6)² = 5²
- Center (0,6) , radius = 5
4. (x+9)²+y² = 81
- (x-(-9))²+(y-0)²=9²
- Center (-9,0) , radius = 9
5. x²+y²-8x+2y-32=0
- (x²-8x+_)+(y²+2y+_)=32+_+_
- (x²-8x+16)+(y²+2y+1)=32+16+1
- (x-4)²+(y+1)²=49
- (x-4)²+(y-(-1))²=7²
- Center (4,-1) , radius = 7
ANSWER
- Center (0,0) , radius = 13
- Center (2,4) , radius = 6
- Center (0,6) , radius = 5
- Center (-9,0) , radius = 9
- Center (4,-1) , radius = 7
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