Kalkulator Persamaan Kuadrat

Selesaikan persamaan kuadrat langkah demi langkah

Kalkulator ini akan menyelesaikan persamaan kuadrat langkah demi langkah, baik dengan melengkapi kuadrat maupun menggunakan rumus kuadrat. Kalkulator ini akan menemukan akar real maupun imajiner (kompleks).

Kalkulator terkait: Kalkulator Diskriminan

Enter a quadratic equation:

For example, x^2+4x+3=0 or x^2+4=5x.

Choose a method:

If the calculator did not compute something or you have identified an error, or you have a suggestion/feedback, please contact us.

Solution

Your input: solve the quadratic equation $$$y^{2} - 20 y + 64 = 0$$$ by using quadratic formula.

The standard quadratic equation has the form $$$ay^2+by+c=0$$$.

In our case, $$$a=1$$$, $$$b=-20$$$, $$$c=64$$$.

Now, find the discriminant using the formula $$$D=b^2-4ac$$$: $$$D=\left(-20\right)^2-4\cdot 1 \cdot 64=144$$$.

Find the roots of the equation using the formulas $$$y_1=\frac{-b-\sqrt{D}}{2a}$$$ and $$$y_2=\frac{-b+\sqrt{D}}{2a}$$$

$$$y_1=\frac{-\left(-20\right)-\sqrt{144}}{2\cdot 1}=4$$$ and $$$y_2=\frac{-\left(-20\right)+\sqrt{144}}{2\cdot 1}=16$$$

Answer: $$$y_1=4$$$; $$$y_2=16$$$


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