Question

find k is distance between A(k,-8) and B(-7,-3) is 13​

Answer 1

Answer:

k=-20 or 4

Step-by-step explanation:

(k+8)²+(-8+3)²=13²

k²+64+16k=169-25=144

     k²+16k-144+64=0

           k²+16k-80=0

            k²+20k-4k-80=0

              k(k+20)-4(k+20)=0

                 (k+20)(k-4)=0

k+20=0  or   k-4=0

⇒ k=-20 or k=4

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