Evaluate
16\sqrt{5}\approx 35.77708764
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\sqrt{1024-4\left(-64\right)}
Calculate 32 to the power of 2 and get 1024.
\sqrt{1024-\left(-256\right)}
Multiply 4 and -64 to get -256.
\sqrt{1024+256}
The opposite of -256 is 256.
\sqrt{1280}
Add 1024 and 256 to get 1280.
16\sqrt{5}
Factor 1280=16^{2}\times 5. Rewrite the square root of the product \sqrt{16^{2}\times 5} as the product of square roots \sqrt{16^{2}}\sqrt{5}. Take the square root of 16^{2}.
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}