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人気のある代数 >

16x^2+25x^2=400

解

16 x^{2} + 25 x^{2} = 400

解

x = \frac{20}{41}, x = - \frac{20}{41}

+1

十進法表記

x = 3.12347 \dots, x = - 3.12347 \dots

解答ステップ

16 x^{2} + 25 x^{2} = 400

類似した元を足す:

16 x^{2} + 25 x^{2} = 41 x^{2}

41 x^{2} = 400

以下で両辺を割る

41

x^{2} = \frac{400}{41}

x^{2} = f (a)

の場合, 解は

x = f (a), - f (a)

x = \frac{400}{41}, x = - \frac{400}{41}

\frac{400}{41} = \frac{20}{41}

- \frac{400}{41} = - \frac{20}{41}

x = \frac{20}{41}, x = - \frac{20}{41}

グラフ

人気の例

completesquare x^2+2x-6=0

co m pl e t es q u a re x^{2} + 2 x - 6 = 0

w^{2} + 4 w - 45 = 0

9 x^{2} - \frac{1}{4} = 0

2x^2-5x=4-7x+x^2

2 x^{2} - 5 x = 4 - 7 x + x^{2}

solvefor x,x^2=a^2

so l v e f or x, x^{2} = a^{2}