\left\{ \begin{array} { l } { b + a = 5 } \\ { a b = 7 } \end{array} \right.
Selesaikan untuk b, a
b=\frac{5+\sqrt{3}i}{2}\approx 2.5+0.866025404i\text{, }a=\frac{-\sqrt{3}i+5}{2}\approx 2.5-0.866025404i
b=\frac{-\sqrt{3}i+5}{2}\approx 2.5-0.866025404i\text{, }a=\frac{5+\sqrt{3}i}{2}\approx 2.5+0.866025404i
Kongsi
Disalin ke papan klip
Contoh
Persamaan kuadratik
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometri
4 \sin \theta \cos \theta = 2 \sin \theta
Persamaan linear
y = 3x + 4
Aritmetik
699 * 533
Matriks
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Persamaan serentak
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Pembezaan
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Pengamiran
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Had
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}