Grade 11Algebra
When we have to find roots of z^3= -8Do we convert -8 into +8? Please provide an explanation and solution.
When we have to find roots of z^3= -8
Do we convert -8 into +8? Please provide an explanation and solution.
1 Answer
Vaibhav Singh
z3 = -8
=> z3 = (-2)3
=> (-z/2)3 = 1
=> -z/2 = 1, 
, 2 ( Cube root of unity)
=> z = -2, -2, -22 ( =(-1 +
3i)/2 and 2 =(-1 -3i)/2 )
=> z = -2, 1 +3i, 1 -3i
Other Related Questions on algebra
How do you write “the product of 18 and q” as an algebraic expression?
How do you write “the product of 18 and q” as an algebraic expression?
algebra
Last Activity: 2 Years ago