\left\{ \begin{array} { l } { x = 4 } \\ { y = ( x + 2 ) ( x - 1 ) } \end{array} \right.
Solve for x, y
x=4
y=18
Graph
Share
Copied to clipboard
y=\left(4+2\right)\left(4-1\right)
Consider the second equation. Insert the known values of variables into the equation.
y=6\left(4-1\right)
Add 4 and 2 to get 6.
y=6\times 3
Subtract 1 from 4 to get 3.
y=18
Multiply 6 and 3 to get 18.
x=4 y=18
The system is now solved.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\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]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}