For the numbers in 
form, convert to polar form:
By DeMoivre's theorem,
For the numbers already in polar form, DeMoivre's theorem can be applied directly:
At second glance, I think the 2s in the last two numbers should also be getting raised to the 3rd and 4th powers:
If G is the midpoint of FH find FG
fg=11x-7 gh= 3x+9
the axis of symmetry would be x=1
If I am reading the question correctly it would come out to -6x+42 First do all the addition and squaring, then factor in that negative. You come out to -2x^3 +2x^3-4x-2x+25+5+9+3. The x^3's cancel, the -x's add to -6x, then all that other adds to 42.
She has distributed the bracket incorrectly
(64 + 5) - 0.2(- 20 + 10)
= (69) - 0.2 (- 10)
=34.5 + 2
= 36.5
