Question 389047
{{{ab=b-a}}}=({{{-2.8-(-4.3)}}},{{{0.2-(-0.9)}}})
{{{ab=b-a}}}=({{{-2.8+4.3}}},{{{0.2+0.9}}})
Then to find the magnitude,
{{{abs(ab)= sqrt((-2.8+4.3)^2+(0.2+0.9)^2))}}}