Skip to main content
Solve for x (complex solution)
Tick mark Image
Graph

Similar Problems from Web Search

Share

-40x^{2}-3=0
Combine x^{2} and -41x^{2} to get -40x^{2}.
-40x^{2}=3
Add 3 to both sides. Anything plus zero gives itself.
x^{2}=-\frac{3}{40}
Divide both sides by -40.
x=\frac{\sqrt{30}i}{20} x=-\frac{\sqrt{30}i}{20}
The equation is now solved.
-40x^{2}-3=0
Combine x^{2} and -41x^{2} to get -40x^{2}.
x=\frac{0±\sqrt{0^{2}-4\left(-40\right)\left(-3\right)}}{2\left(-40\right)}
This equation is in standard form: ax^{2}+bx+c=0. Substitute -40 for a, 0 for b, and -3 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\left(-40\right)\left(-3\right)}}{2\left(-40\right)}
Square 0.
x=\frac{0±\sqrt{160\left(-3\right)}}{2\left(-40\right)}
Multiply -4 times -40.
x=\frac{0±\sqrt{-480}}{2\left(-40\right)}
Multiply 160 times -3.
x=\frac{0±4\sqrt{30}i}{2\left(-40\right)}
Take the square root of -480.
x=\frac{0±4\sqrt{30}i}{-80}
Multiply 2 times -40.
x=-\frac{\sqrt{30}i}{20}
Now solve the equation x=\frac{0±4\sqrt{30}i}{-80} when ± is plus.
x=\frac{\sqrt{30}i}{20}
Now solve the equation x=\frac{0±4\sqrt{30}i}{-80} when ± is minus.
x=-\frac{\sqrt{30}i}{20} x=\frac{\sqrt{30}i}{20}
The equation is now solved.