Which method do you use to solve the quadratic equation

Mlejd5

Mlejd5

Answered question

2022-01-21

Which method do you use to solve the quadratic equation 81x2+1=0?

Answer & Explanation

shimmertulipsog

shimmertulipsog

Beginner2022-01-22Added 10 answers

I would try to isolate x.
81x2+1=0
by subtracting 1,
81x2=1
by dividing by 81,
x2=181
Since x2 can never be negative for a real number x, the equation has no real solutions; however, if you are looking for its complex solutions, then by taking the square-root,
x=±181=±i9

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