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

Answer 1

PLease help

Answer 2

Quadratic formula

Answer 3

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

Answer 4

cwrw 238 are you writing anything?

Answer 5

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)

Answer 6

Thanks!