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受欢迎的代数 >

16x^2-40=0

解答

16 x^{2} - 40 = 0

解答

x = \frac{5}{2}, x = - \frac{5}{2}

+1

十进制

x = 1.58113 \dots, x = - 1.58113 \dots

求解步骤

16 x^{2} - 40 = 0

将

40

到右边

16 x^{2} = 40

两边除以

16

x^{2} = \frac{5}{2}

对于

x^{2} = f (a)

解为

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

x = \frac{5}{2}, x = - \frac{5}{2}

作图

流行的例子

4x(8x)+8-12=15x^2-12(25+16)

4 x (8 x) + 8 - 12 = 15 x^{2} - 12 (25 + 16)

w^{2} + 9 = 0

q^{2} - 48 = 0

因式分解 3x^2+8x+4=0

f a c t or 3 x^{2} + 8 x + 4 = 0

2 x - 3 = x^{2} - 6 x + 9