Answer:
x = { 1 + 2√22, 1 - 2√22}
Step-by-step explanation:
The quadratic equation:
x = (-b ± [tex]\sqrt{b^{2} - 4ac}[/tex])/2a
x = (4 ± √(16-4(2)(-9))/2(2)
(Also, I'm assuming =9 meant -9, but either way, it wouldn't make a difference)
x = (4 ± √(16+72))/4
x = (4 ± √88)/4
x = 1 ± 2√22
x = { 1 + 2√22, 1 - 2√22}
I got the same answers as you! If you're looking for a more specific answer, plug it into a calculator for decimals.
It looks like you didn't need any help!
