Evaluate
16a^{4}-b^{2}
Expand
16a^{4}-b^{2}
Share
Copied to clipboard
\left(-b\right)b-4\left(-b\right)a^{2}-4a^{2}b+16a^{4}
Use the distributive property to multiply -b-4a^{2} by b-4a^{2}.
\left(-b\right)b+4ba^{2}-4a^{2}b+16a^{4}
Multiply -4 and -1 to get 4.
\left(-b\right)b+16a^{4}
Combine 4ba^{2} and -4a^{2}b to get 0.
-b^{2}+16a^{4}
Multiply b and b to get b^{2}.
\left(-b\right)b-4\left(-b\right)a^{2}-4a^{2}b+16a^{4}
Use the distributive property to multiply -b-4a^{2} by b-4a^{2}.
\left(-b\right)b+4ba^{2}-4a^{2}b+16a^{4}
Multiply -4 and -1 to get 4.
\left(-b\right)b+16a^{4}
Combine 4ba^{2} and -4a^{2}b to get 0.
-b^{2}+16a^{4}
Multiply b and b to get b^{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}