Evaluate
\left(3x+7\right)^{2}x^{4}
Expand
9x^{6}+42x^{5}+49x^{4}
Graph
Share
Copied to clipboard
49\left(x^{2}\right)^{2}+42x^{2}x^{3}+9\left(x^{3}\right)^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(7x^{2}+3x^{3}\right)^{2}.
49x^{4}+42x^{2}x^{3}+9\left(x^{3}\right)^{2}
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
49x^{4}+42x^{5}+9\left(x^{3}\right)^{2}
To multiply powers of the same base, add their exponents. Add 2 and 3 to get 5.
49x^{4}+42x^{5}+9x^{6}
To raise a power to another power, multiply the exponents. Multiply 3 and 2 to get 6.
49\left(x^{2}\right)^{2}+42x^{2}x^{3}+9\left(x^{3}\right)^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(7x^{2}+3x^{3}\right)^{2}.
49x^{4}+42x^{2}x^{3}+9\left(x^{3}\right)^{2}
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
49x^{4}+42x^{5}+9\left(x^{3}\right)^{2}
To multiply powers of the same base, add their exponents. Add 2 and 3 to get 5.
49x^{4}+42x^{5}+9x^{6}
To raise a power to another power, multiply the exponents. Multiply 3 and 2 to get 6.
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}