Evaluate
-21
Factor
-21
Quiz
Arithmetic
5 problems similar to:
\frac { 63 } { 7 } - 6 \cdot 9 + 6 \cdot 5 - \frac { 42 } { 7 }
Share
Copied to clipboard
9-6\times 9+6\times 5-\frac{42}{7}
Divide 63 by 7 to get 9.
9-54+6\times 5-\frac{42}{7}
Multiply 6 and 9 to get 54.
-45+6\times 5-\frac{42}{7}
Subtract 54 from 9 to get -45.
-45+30-\frac{42}{7}
Multiply 6 and 5 to get 30.
-15-\frac{42}{7}
Add -45 and 30 to get -15.
-15-6
Divide 42 by 7 to get 6.
-21
Subtract 6 from -15 to get -21.
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}