Solve the equation and express each solution in a+bi form. 7x^2+18=0

x =0  ±3/7 i  sqrt(14)

Step-by-step explanation:

7x^2 + 18 = 0

subtract 18 from each side

7x^2 = -18

divide by 7

x^2 = -18/7

take the square root of each side

sqrt(x^2) = ±sqrt(-18/7)

sqrt(x^2) = ±sqrt(-1) sqrt(18/7)

sqrt(-1) = i

x = ±isqrt(18/7)

x = ±isqrt(18)/sqrt(7)

x = ±isqrt(9)sqrt(2)/sqrt(7)

x = ±3i sqrt(2)/sqrt(7)

cannot leave a sqrt in the denominator

x = ±3i  sqrt(2) * sqrt(7)/ (sqrt(7)* sqrt(7))

x = ±3i  sqrt(14)/7

x = ±3/7 i  sqrt(14)

depends on how many days you are talking about

step-by-step explanation:

30

step-by-step explanation:

idk

i hope i