Evaluate
-x^{2}+\frac{3x}{2}+27
Expand
-x^{2}+\frac{3x}{2}+27
Graph
Share
Copied to clipboard
\left(\frac{3\times 2}{2}-\frac{x}{2}\right)\left(2x+9\right)
To add or subtract expressions, expand them to make their denominators the same. Multiply 3 times \frac{2}{2}.
\frac{3\times 2-x}{2}\left(2x+9\right)
Since \frac{3\times 2}{2} and \frac{x}{2} have the same denominator, subtract them by subtracting their numerators.
\frac{6-x}{2}\left(2x+9\right)
Do the multiplications in 3\times 2-x.
\frac{\left(6-x\right)\left(2x+9\right)}{2}
Express \frac{6-x}{2}\left(2x+9\right) as a single fraction.
\frac{12x+54-2x^{2}-9x}{2}
Apply the distributive property by multiplying each term of 6-x by each term of 2x+9.
\frac{3x+54-2x^{2}}{2}
Combine 12x and -9x to get 3x.
\left(\frac{3\times 2}{2}-\frac{x}{2}\right)\left(2x+9\right)
To add or subtract expressions, expand them to make their denominators the same. Multiply 3 times \frac{2}{2}.
\frac{3\times 2-x}{2}\left(2x+9\right)
Since \frac{3\times 2}{2} and \frac{x}{2} have the same denominator, subtract them by subtracting their numerators.
\frac{6-x}{2}\left(2x+9\right)
Do the multiplications in 3\times 2-x.
\frac{\left(6-x\right)\left(2x+9\right)}{2}
Express \frac{6-x}{2}\left(2x+9\right) as a single fraction.
\frac{12x+54-2x^{2}-9x}{2}
Apply the distributive property by multiplying each term of 6-x by each term of 2x+9.
\frac{3x+54-2x^{2}}{2}
Combine 12x and -9x to get 3x.
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}