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受欢迎的代数 >

(1.2)^2+x^2=1.8^2

解答

(1.2)^{2} + x^{2} = 1. 8^{2}

解答

x = \frac{3}{5}, x = - \frac{3}{5}

+1

十进制

x = 1.34164 \dots, x = - 1.34164 \dots

求解步骤

(1.2)^{2} + x^{2} = 1. 8^{2}

展开

1. 2^{2} + x^{2} : 1.44 + x^{2}

展开

1. 8^{2} : 3.24

1.44 + x^{2} = 3.24

将

1.44

到右边

x^{2} = 1.8

对于

x^{2} = f (a)

解为

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

x = 1.8, x = - 1.8

1.8 = \frac{3}{5}

- 1.8 = - \frac{3}{5}

x = \frac{3}{5}, x = - \frac{3}{5}

作图

流行的例子

- 3 x (x + 5) = 0

x^{2} = - 4 x - 3

x^2=2.5^2+10.9^2

x^{2} = 2. 5^{2} + 10. 9^{2}

97 = 215 x - 16 x^{2}

-16x^2+112x+128=0

- 16 x^{2} + 112 x + 128 = 0