How do you find the absolute value of #-9+6i#?
1 Answer
Sep 25, 2016
Explanation:
Given a complex number
#z=x+yi# then using Pythagoras' theorem, it's magnitude is.
#color(red)(bar(ul(|color(white)(a/a)color(black)(|z|=|x+yi|=sqrt(x^2+y^2))color(white)(a/a)|)))# here x = - 9 and y = 6
#rArrsqrt((-9)^2+6^2)=sqrt(81+36)=sqrt117" absolute value"#