Evaluate
2\left(b+c\right)
Expand
2b+2c
Quiz
Algebra
5 problems similar to:
( \frac { b } { c } - \frac { c } { b } ) : \frac { b - c } { 2 b c }
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\frac{\frac{bb}{bc}-\frac{cc}{bc}}{\frac{b-c}{2bc}}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of c and b is bc. Multiply \frac{b}{c} times \frac{b}{b}. Multiply \frac{c}{b} times \frac{c}{c}.
\frac{\frac{bb-cc}{bc}}{\frac{b-c}{2bc}}
Since \frac{bb}{bc} and \frac{cc}{bc} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{b^{2}-c^{2}}{bc}}{\frac{b-c}{2bc}}
Do the multiplications in bb-cc.
\frac{\left(b^{2}-c^{2}\right)\times 2bc}{bc\left(b-c\right)}
Divide \frac{b^{2}-c^{2}}{bc} by \frac{b-c}{2bc} by multiplying \frac{b^{2}-c^{2}}{bc} by the reciprocal of \frac{b-c}{2bc}.
\frac{2\left(b^{2}-c^{2}\right)}{b-c}
Cancel out bc in both numerator and denominator.
\frac{2\left(b+c\right)\left(b-c\right)}{b-c}
Factor the expressions that are not already factored.
2\left(b+c\right)
Cancel out b-c in both numerator and denominator.
2b+2c
Expand the expression.
\frac{\frac{bb}{bc}-\frac{cc}{bc}}{\frac{b-c}{2bc}}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of c and b is bc. Multiply \frac{b}{c} times \frac{b}{b}. Multiply \frac{c}{b} times \frac{c}{c}.
\frac{\frac{bb-cc}{bc}}{\frac{b-c}{2bc}}
Since \frac{bb}{bc} and \frac{cc}{bc} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{b^{2}-c^{2}}{bc}}{\frac{b-c}{2bc}}
Do the multiplications in bb-cc.
\frac{\left(b^{2}-c^{2}\right)\times 2bc}{bc\left(b-c\right)}
Divide \frac{b^{2}-c^{2}}{bc} by \frac{b-c}{2bc} by multiplying \frac{b^{2}-c^{2}}{bc} by the reciprocal of \frac{b-c}{2bc}.
\frac{2\left(b^{2}-c^{2}\right)}{b-c}
Cancel out bc in both numerator and denominator.
\frac{2\left(b+c\right)\left(b-c\right)}{b-c}
Factor the expressions that are not already factored.
2\left(b+c\right)
Cancel out b-c in both numerator and denominator.
2b+2c
Expand the expression.
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}