Question

the distance between P(a, 7) and Q(1, 3) is5, find value of a. ​

Answer 1

Answer:

4

Step-by-step explanation:

apply distance formulae

that. is

whole root of( x2-x1)^2+(y2-y1)^2

Answer 2

Answer:

Step-by-step explanation:

(a-1)^2 + (7-3)^2 = 5^2

a^2-2a+1 + 4^2 = 25

a^2-2a+1+16-25=0

a^2-2a-8=0

a^2-4a+2a-8=0

a(a-4)+2(a-4)=0

(a+2)(a-4) = 0

a= 4 , -2