Question

Solve the equation.

81x^2+4=0

Answer 1

the minimum is (0,4)

the y intercept is (0,4)

there isn't an actual solution

Answer 2

Step 1: Subtract 4 from both sides.

81x^2+4=0

81x^2=-4

Step 2: Divide both sides by 81.

81x^2/81=-4/81

x^2=-4/81

Step 3: Take square root.

x=±
`\sqrt{(-4)/(81)}`

Answer: No real solutions.