Solve for x
x = -\frac{31}{2} = -15\frac{1}{2} = -15.5
Assign x
x≔-\frac{31}{2}
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x=-9-\frac{\sqrt{81-4\times 1\left(-22\right)}}{2\times 1}
Calculate 9 to the power of 2 and get 81.
x=-9-\frac{\sqrt{81-4\left(-22\right)}}{2\times 1}
Multiply 4 and 1 to get 4.
x=-9-\frac{\sqrt{81-\left(-88\right)}}{2\times 1}
Multiply 4 and -22 to get -88.
x=-9-\frac{\sqrt{81+88}}{2\times 1}
The opposite of -88 is 88.
x=-9-\frac{\sqrt{169}}{2\times 1}
Add 81 and 88 to get 169.
x=-9-\frac{13}{2\times 1}
Calculate the square root of 169 and get 13.
x=-9-\frac{13}{2}
Multiply 2 and 1 to get 2.
x=-\frac{18}{2}-\frac{13}{2}
Convert -9 to fraction -\frac{18}{2}.
x=\frac{-18-13}{2}
Since -\frac{18}{2} and \frac{13}{2} have the same denominator, subtract them by subtracting their numerators.
x=-\frac{31}{2}
Subtract 13 from -18 to get -31.
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}