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受欢迎的代数 >

(5sqrt(2))^2=x^2+x^2

解答

(52)^{2} = x^{2} + x^{2}

解答

x = 5, x = - 5

求解步骤

(52)^{2} = x^{2} + x^{2}

交换两边

x^{2} + x^{2} = (52)^{2}

化简

x^{2} + x^{2} : 2 x^{2}

化简

(52)^{2} : 50

2 x^{2} = 50

两边除以

2

x^{2} = 25

对于

x^{2} = f (a)

解为

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

x = 25, x = - 25

25 = 5

- 25 = - 5

x = 5, x = - 5

作图

流行的例子

2 x^{2} + 8 x = 7

q (q - 3) - 4 = 0

128=-16t^2+32t+128

128 = - 16 t^{2} + 32 t + 128

completesquare x^2+x-2

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

4 x^{2} + 16 x - 53 = 5