Question

Help! please and thank you :)

Answer 1

`2x^2 + 100 =0`

Comparing equation to
`ax^2+bx+c =0`

a = 2

b= 0

c= 100

`x = \displaystyle (-b \pm √(b^2 - 4ac))/(2a)`

`x = \displaystyle (0 \pm √(0 - 4 × 2 × 100))/(2×2)`

`x = \displaystyle (\pm 20√(-2))/(4)`

`x = \pm 5\sqrt2 i`

Thus the answer is (b)