Which equation shows the quadratic formula used correctly to solve 5x^2+3x-4=0

x = sqrt(89)/10 - 3/10 or x = -3/10 - sqrt(89)/10

Step-by-step explanation:

Solve for x over the real numbers:

5 x^2 + 3 x - 4 = 0

Divide both sides by 5:

x^2 + (3 x)/5 - 4/5 = 0

Add 4/5 to both sides:

x^2 + (3 x)/5 = 4/5

Add 9/100 to both sides:

x^2 + (3 x)/5 + 9/100 = 89/100

Write the left hand side as a square:

(x + 3/10)^2 = 89/100

Take the square root of both sides:

x + 3/10 = sqrt(89)/10 or x + 3/10 = -sqrt(89)/10

Subtract 3/10 from both sides:

x = sqrt(89)/10 - 3/10 or x + 3/10 = -sqrt(89)/10

Subtract 3/10 from both sides:

x = sqrt(89)/10 - 3/10 or x = -3/10 - sqrt(89)/10

correct answer:

i^31 = -i

idk

step-by-step explanation: i just don't