Question

[Find a if the distance between (a, 2) and (3, 4) is 8.1
_ 1​

Answer 1

Answer:

a,2-3,4=8.1

a, 3=8.1

a=8.1/3

Answer 2

Answer:

$distance = \sqrt{(x1 - x2) {}^{2} + (y1 - y2 ) {}^{2} } \\ \: \: 8.1 \: \: \: \: \: \: \: \: \: = \sqrt{(a - 3) {}^{2} +( 2 - 4) {}^{2} } \\ 8.1 \: \: \: \: \: \: \: \: \: \: = \sqrt{(a {}^{2} - 6a + 9) + ( - 2) {}^{2} } \\( 8.1) {}^{2} \: \: \: \: \: =( a {}^{2} - 6a + 9 )+4 \\ 65.61 - 4 \: \: \: \: \: \: = a {}^{2} - 6a + 9 \\ 65.57 - 9 \: \: \: \: =a {}^{2} - 6a \\ 65.48 \: \: \: \: \: \: = a {}^{2} - 6 a$