Answer:
The options for this quadratic equation are x = -4 + √20 and x = -4 - √20.
Explanation:
1. The quadratic equation you furnished is 4(x+4)² - eighty = zero
2. To remedy this equation, we can first simplify it by way of dividing each aspect using 4, which offers us (x+4)² - 20 = zero
3. add 20 to each facet of the equation to get (x+4)² = 20.
4. Take the rectangular root of each facet of the equation to get x+4 = ±√20, which simplifies to x = -4 ± √20.