Question

The distance between the points (0,0) and (a - b, a + b) is
(A)
2ab
(B)
2a² + ab
(C) 21a2 + b2
(D
2a2 + 2b2
Two dice are thrown simultaneously. The probability that t​

Answer 1

distance formula =√[(x1-x2)^2+(y1-y2)^2]

=√[(0-a+b)^2+(0-a-b)^2]

=√[a^2+b^2-2ab+a^2+b^2+2ab]

D =√[2a^2+2b^2]