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受欢迎的代数 >

x^2-10x+25=(x-a)^2

解答

x^{2} - 10 x + 25 = (x - a)^{2}

解答

x = \frac{a + 5}{2}; a \neq = 5

求解步骤

x^{2} - 10 x + 25 = (x - a)^{2}

展开

(x - a)^{2} : x^{2} - 2 a x + a^{2}

x^{2} - 10 x + 25 = x^{2} - 2 a x + a^{2}

将

25

到右边

x^{2} - 10 x = x^{2} - 2 a x + a^{2} - 25

两边减去

x^{2} - 2 a x

x^{2} - 10 x - (x^{2} - 2 a x) = x^{2} - 2 a x + a^{2} - 25 - (x^{2} - 2 a x)

化简

2 a x - 10 x = a^{2} - 25

分解

2 a x - 10 x : 2 x (a - 5)

2 x (a - 5) = a^{2} - 25

两边除以

2 (a - 5); a \neq = 5

x = \frac{a + 5}{2}; a \neq = 5

作图

流行的例子

0.25(5x-4)=0.05(10x-5)

0.25 (5 x - 4) = 0.05 (10 x - 5)

f(x)(x^2)=f(x)(x)^2

f (x) (x^{2}) = f (x) (x)^{2}

solvefor x,5x+3y=-2

so l v e f or x, 5 x + 3 y = - 2

solvefor x,9x-3y=9

so l v e f or x, 9 x - 3 y = 9

solvefor c,4c+d+10=8c+2d

so l v e f or c, 4 c + d + 10 = 8 c + 2 d