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受欢迎的代数 >

11^2+8^2=x^2

解答

1 1^{2} + 8^{2} = x^{2}

解答

x = 185, x = - 185

+1

十进制

x = 13.60147 \dots, x = - 13.60147 \dots

求解步骤

1 1^{2} + 8^{2} = x^{2}

交换两边

x^{2} = 1 1^{2} + 8^{2}

化简

1 1^{2} + 8^{2} : 185

对于

x^{2} = f (a)

解为

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

x = 185, x = - 185

作图

流行的例子

x^{2} - 16 x + 64 = 4

(3x+2)(5x+1)=ax^2+bx+2

(3 x + 2) (5 x + 1) = a x^{2} + b x + 2

solvefor y,y^2=(x^3)/(4-x)

so l v e f or y, y^{2} = \frac{x ^{3}}{4 - x}

(x-3)^2-(2x+1)(2x-1)=5(1-x)+3

(x - 3)^{2} - (2 x + 1) (2 x - 1) = 5 (1 - x) + 3

3 x^{2} + 13 x = 0