Solve –3x2 + 30x – 90 = 0 please help i give medals! Answer choices:
A.x=5+/-2i√5
B.x=5+/-i√5
C.x=10+/-2i√5
D.x=10+/-i√5
First answer gets medal

Question

Solve –3x2 + 30x – 90 = 0  please help i give medals! Answer choices:
A.x=5+/-2i√5
B.x=5+/-i√5
C.x=10+/-2i√5
D.x=10+/-i√5
First answer gets medal

anonymous · Answer

PLease help

anonymous · Answer

Quadratic formula

anonymous · Answer

i know that lol im not sure how to actually work it

anonymous · Answer

cwrw 238 are you writing anything?

cwrw238 · Answer

divide through by -3 
x^2 - 10x + 30 = 0

using the quadratic formula:

x = [-(-10) +/1 (sqrt(100 - 4*1*30)]  / 2
    = 10 +/- (sqrt( -20) / 2
     = [10+/-  sqrt(4 *-5)] / 2
     =  5 +/-  i√5

where i = sqrt(-1)

anonymous · Answer

Thanks!