Question

How do I solve this properly?

Answer 1

x
`\geq` 4

Explanation:

4x^2 - 64
`\geq` 0 ; move 64 over

4x^2
`\geq` 64 ; divide by 4

x^2
`\geq` 16 ; take square root of both sides

x
`\geq` 4