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(x+4)(x-12)=5x
简化 (x + 4)(x + -12) = 5x 重新排序条件: (4 + x)(x + -12) = 5x 重新排序条件: (4 + x)(-12 + x) = 5x Multiply (4 + x) * (-12 + x) (4(-12 + x) + x(-12 + x)) = 5x ((-12 * 4 + x * 4) + x(-12 + x)) = 5x ((-48 + 4x) + x(-12 + x)) = 5x (-48 + 4x + (-12 * x + x * x)) = 5x (-48 + 4x + (-12x + x2)) = 5x 组合类似条件: 4x + -12x = -8x (-48 + -8x + x2) = 5x 解: -48 + -8x + x2 = 5x 求解变量 'x'. 重新排序条件: -48 + -8x + -5x + x2 = 5x + -5x 组合类似条件: -8x + -5x = -13x -48 + -13x + x2 = 5x + -5x 组合类似条件: 5x + -5x = 0 -48 + -13x + x2 = 0 一个三项方程式.. (-3 + -1x)(16 + -1x) = 0小问题 1
设置因子 '(-3 + -1x)' 等于零并尝试解决: 简化 -3 + -1x = 0 解: -3 + -1x = 0 移动所有条件 x 到左边,所有其他条件放右边. 添加 '3' 到等式的每一边. -3 + 3 + -1x = 0 + 3 组合类似条件: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 组合类似条件: 0 + 3 = 3 -1x = 3 两边除以'-1'. x = -3 简化 x = -3小问题 2
设置因子 '(16 + -1x)' 等于零并尝试解决: 简化 16 + -1x = 0 解: 16 + -1x = 0 移动所有条件 x 到左边,所有其他条件放右边. 添加 '-16' 到等式的每一边. 16 + -16 + -1x = 0 + -16 组合类似条件: 16 + -16 = 0 0 + -1x = 0 + -16 -1x = 0 + -16 组合类似条件: 0 + -16 = -16 -1x = -16 两边除以'-1'. x = 16 简化 x = 16解得
x = {-3, 16}
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