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人気のある代数 >

展開する (x^2+4z^2)^5

解

展開する

(x^{2} + 4 z^{2})^{5}

解

x^{10} + 20 x^{8} z^{2} + 160 x^{6} z^{4} + 640 x^{4} z^{6} + 1280 x^{2} z^{8} + 1024 z^{10}

解答ステップ

(x^{2} + 4 z^{2})^{5}

2項定理を適用する:

(a + b)^{n} = i = 0 \sum n (i n) a^{(n - i)} b^{i}

a = x^{2}, b = 4 z^{2}

= i = 0 \sum 5 (i 5) (x^{2})^{(5 - i)} (4 z^{2})^{i}

総和を展開する

= \frac{5 !}{0 ! ( 5 - 0 ) !} (x^{2})^{5} (4 z^{2})^{0} + \frac{5 !}{1 ! ( 5 - 1 ) !} (x^{2})^{4} (4 z^{2})^{1} + \frac{5 !}{2 ! ( 5 - 2 ) !} (x^{2})^{3} (4 z^{2})^{2} + \frac{5 !}{3 ! ( 5 - 3 ) !} (x^{2})^{2} (4 z^{2})^{3} + \frac{5 !}{4 ! ( 5 - 4 ) !} (x^{2})^{1} (4 z^{2})^{4} + \frac{5 !}{5 ! ( 5 - 5 ) !} (x^{2})^{0} (4 z^{2})^{5}

簡素化

\frac{5 !}{0 ! ( 5 - 0 ) !} (x^{2})^{5} (4 z^{2})^{0} : x^{10}

簡素化

\frac{5 !}{1 ! ( 5 - 1 ) !} (x^{2})^{4} (4 z^{2})^{1} : 20 x^{8} z^{2}

簡素化

\frac{5 !}{2 ! ( 5 - 2 ) !} (x^{2})^{3} (4 z^{2})^{2} : 160 x^{6} z^{4}

簡素化

\frac{5 !}{3 ! ( 5 - 3 ) !} (x^{2})^{2} (4 z^{2})^{3} : 640 x^{4} z^{6}

簡素化

\frac{5 !}{4 ! ( 5 - 4 ) !} (x^{2})^{1} (4 z^{2})^{4} : 1280 x^{2} z^{8}

簡素化

\frac{5 !}{5 ! ( 5 - 5 ) !} (x^{2})^{0} (4 z^{2})^{5} : 1024 z^{10}

= x^{10} + 20 x^{8} z^{2} + 160 x^{6} z^{4} + 640 x^{4} z^{6} + 1280 x^{2} z^{8} + 1024 z^{10}

人気の例

簡約 5/6-1/(6x)

s im pl i f y \frac{5}{6} - \frac{1}{6 x}

簡約 2(x-1)^2-2

s im pl i f y 2 (x - 1)^{2} - 2

簡約 log_{a}(8)

s im pl i f y lo g_{a} (8)

- 1 \frac{1}{5}

簡約 log_{2}(0.02)

s im pl i f y lo g_{2} (0.02)