SOLUTION: using the distance formula how would u find a in the following problem (-4,1)(a,8);d=square root of 50

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Question 137198: using the distance formula
how would u find a in the following problem
(-4,1)(a,8);d=square root of 50
Answer by checkley77(12569) About Me  (Show Source):
You can put this solution on YOUR website!
X DISTANCE=A+4
Y DISTANCE=8-1=7
(A+4)^2+7^2=SQRT50^2
A^2+8A+16+49=50
A^2+8X+65-50=0
A^2+8X+15=0
(A+5)(A+3)=0
A+5=0
A=-5 ANSWER
A+3=0
A=-3 ANSWWER