Answer:
x = -0.683 (3dp)
x = -7.317 (3dp)
Step-by-step explanation:
Step 1: Apply the quadratic formula
(-b±([tex]\sqrt{b^{2}-4ac}[/tex])) / 2a
a = 1 (x²)
b = 8 (8x)
c = 5 (5)
(-8±([tex]\sqrt{8^{2}-4 x 1 x 5}[/tex])) / 2 x 1
Step 2: Simplify
(-8±([tex]\sqrt{44}[/tex])) / 2
Step 3: Solve
You need to replace the ± with first a + and then a -.
(-8+([tex]\sqrt{44}[/tex])) / 2 = -0.683 (3dp) = x
(-8-([tex]\sqrt{44}[/tex])) / 2 = -7.317 (3dp) = x
Hope this helps!
