Evaluate
-b\left(9b+4\right)
Expand
-9b^{2}-4b
Share
Copied to clipboard
4b^{2}-\left(-b+13b^{2}-9b\right)-\left(1+14b-1\right)
To find the opposite of -13b^{2}+9b, find the opposite of each term.
4b^{2}-\left(-b\right)-13b^{2}+9b-\left(1+14b-1\right)
To find the opposite of -b+13b^{2}-9b, find the opposite of each term.
-9b^{2}-\left(-b\right)+9b-\left(1+14b-1\right)
Combine 4b^{2} and -13b^{2} to get -9b^{2}.
-9b^{2}-\left(-b\right)+9b-14b
Subtract 1 from 1 to get 0.
-9b^{2}-\left(-b\right)-5b
Combine 9b and -14b to get -5b.
-9b^{2}+b-5b
Multiply -1 and -1 to get 1.
-9b^{2}-4b
Combine b and -5b to get -4b.
4b^{2}-\left(-b+13b^{2}-9b\right)-\left(1+14b-1\right)
To find the opposite of -13b^{2}+9b, find the opposite of each term.
4b^{2}-\left(-b\right)-13b^{2}+9b-\left(1+14b-1\right)
To find the opposite of -b+13b^{2}-9b, find the opposite of each term.
-9b^{2}-\left(-b\right)+9b-\left(1+14b-1\right)
Combine 4b^{2} and -13b^{2} to get -9b^{2}.
-9b^{2}-\left(-b\right)+9b-14b
Subtract 1 from 1 to get 0.
-9b^{2}-\left(-b\right)-5b
Combine 9b and -14b to get -5b.
-9b^{2}+b-5b
Multiply -1 and -1 to get 1.
-9b^{2}-4b
Combine b and -5b to get -4b.
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}