Solve by completing the square:
x^2+3x-9=0

A.) x=3√5/4 +3/2 or -3√5/4+3/2
B.) x=3√5/2 -3/2 or -3√5 /2 +3/2
C.) x=3√5 /2 -3/2 or -3√5/2 - 3/2
D.) x= 3 √ 5/4 -3/2 or -3√5 /4 -3/2

hope it

step-by-step explanation:

x^(1/6) · x^(1/6) · x^(1/6)   ·x^(1/6) = x^(4/6)   since we add the exponents

4/6 can be simplified to 2/3

the simplified form is x^(2/3)

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

hope to and hope that my answer is brainliest.(follow me )

her total is 2

  -3+5=2