To solve the quadratic equation 4x^2 + 5x + 1 = 0 using the cross-multiplication method, we need to find two numbers whose product is equal to 4 * 1 = 4 (coefficient of x^2 times the constant term) and whose sum is equal to the coefficient of x (5). The numbers that satisfy these conditions are 4 and 1. Next, we rewrite the quadratic equation as: 4x^2 + 4x + x + 1 = 0 Now we group the terms together: (4x^2 + 4x) + (x + 1) = 0 Next, we factor out the common factors from each group: 4x(x + 1) + 1(x + 1) = 0 Now, we can see that we have a common factor of (x + 1): (x + 1)(4x + 1) = 0 Now, we set each factor equal to zero and solve for x: x + 1 = 0 or 4x + 1 = 0 Solving the first equation, x + 1 = 0, gives x = -1. Solving the second equation, 4x + 1 = 0, gives x = -1/4. Therefore, the solutions to the quadratic equation are x = -1 and x = -1/4.
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甄嬛传：瑾汐背叛过甄嬛三次，为什么甄嬛一次都没看出来？
除此之外，在《莲花楼前传》的筹备中，因为两个角色戏份的增加，所以进行了演员的更换，分别是女主乔婉娩和隐藏反派单孤刀。,”哏从国介绍，葫农每年清明前后播种，十月中旬开始采收。
尘封十三载完结了吗
没有，尘封十三载尚未完结。
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