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ab=cd
√(2-1)²+(3+2)²=√(-4-k)²+(-3-2)²
squaring
26=k²+16+8k+25
k²+8k+15=0
k²+3k+5k+15=0
k(k+3)+5(k+3)=0
(k+3)(k+5)=0
k=-3,-5
√(2-1)²+(3+2)²=√(-4-k)²+(-3-2)²
squaring
26=k²+16+8k+25
k²+8k+15=0
k²+3k+5k+15=0
k(k+3)+5(k+3)=0
(k+3)(k+5)=0
k=-3,-5
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