Question

How do you solve the quadratic `10x^2+7=-3` using any method?

Answer 1

Answer is `x=+-i=+-sqrt-1`.

Explanation:

`10x^2+7=-3`
`:.10x^2=-10`
`:.x^2=-1`
`:. x^2=i^2` [ `i` is imaginary number, `i=sqrt-1`]
`:.x=+-i`
`:.x=+-sqrt-1`. (answer).