Question

x^2+18x+4=0
Solve for x,
simplify answers using radicals as needed, express complex numbers in terms of i.

Answer 1

delta = 18 ^2 - 4*4 = 308
x = (-18 + or - sqrt(308)) / 2

Answer 2

it's not right... is that negative then sqrt?

Answer 3

why dont u complete the square or use quadratic formula??

Answer 4

who... me?? That's why I'm posting here... because I don't know these kinds of problems well yet. Need some assistance...

Answer 5

ok. to use the quad formula simplify -18+or-the sqrt of ((18^2-(4)(1)(4)). get that ans then divide by 2

Answer 6

x^2 +18x +4 = 0
sqrt(18^2 -4(1)(4) ) = sqrt( 324 -16) =sqrt(308) = sqrt(4*77) = 2sqrt(77)
x =( -18 +- 2sqrt(77)) / 2
x = -9 +/- [sqrt(77)]