主要内容
代数1
复习有两个变量的多项式加减
多项式加减是将类似项组合起来。 当多项式有两个变量时，找出类似项会变得有点困难。 在本文中，我们将复习一些示例，让你有机会亲自练习这个技能。
加减多项式就是合并同类项.在本文中多项式有两个变量，加大了找出同类项的难度.
例题一
简化.
(−7d3−5d3f3−3f3)−(8d3+4d3f3+2f3)left parenthesis, minus, 7, d, cubed, minus, 5, d, cubed, f, cubed, minus, 3, f, cubed, right parenthesis, minus, left parenthesis, 8, d, cubed, plus, 4, d, cubed, f, cubed, plus, 2, f, cubed, right parenthesis
去括号:
−7d3−5d3f3−3f3−8d3−4d3f3−2f3start color #11accd, minus, 7, d, cubed, minus, 5, d, cubed, f, cubed, minus, 3, f, cubed, end color #11accd, start color #ca337c, minus, 8, d, cubed, minus, 4, d, cubed, f, cubed, minus, 2, f, cubed, end color #ca337c
合并同类项:
(−7d3−8d3)+(−5d3f3−4d3f3)+(−3f3−2f3)left parenthesis, start color #11accd, minus, 7, d, cubed, end color #11accd, start color #ca337c, minus, 8, d, cubed, end color #ca337c, right parenthesis, plus, left parenthesis, start color #11accd, minus, 5, d, cubed, f, cubed, end color #11accd, start color #ca337c, minus, 4, d, cubed, f, cubed, end color #ca337c, right parenthesis, plus, left parenthesis, start color #11accd, minus, 3, f, cubed, end color #11accd, start color #ca337c, minus, 2, f, cubed, end color #ca337c, right parenthesis
简化:
−15d3−9d3f3−5f3minus, 15, d, cubed, minus, 9, d, cubed, f, cubed, minus, 5, f, cubed
例题二
简化.
(u2+5u2v+4uv2)−(u2+5u2v2+4uv)left parenthesis, u, squared, plus, 5, u, squared, v, plus, 4, u, v, squared, right parenthesis, minus, left parenthesis, u, squared, plus, 5, u, squared, v, squared, plus, 4, u, v, right parenthesis
去括号:
u2+5u2v+4uv2−u2−5u2v2−4uvstart color #11accd, u, squared, plus, 5, u, squared, v, plus, 4, u, v, squared, end color #11accd, start color #ca337c, minus, u, squared, minus, 5, u, squared, v, squared, minus, 4, u, v, end color #ca337c
合并同类项:
(u2−u2)+5u2v+4uv2−5u2v2−4uvleft parenthesis, start color #11accd, u, squared, end color #11accd, start color #ca337c, minus, u, squared, end color #ca337c, right parenthesis, start color #11accd, plus, 5, u, squared, v, plus, 4, u, v, squared, end color #11accd, start color #ca337c, minus, 5, u, squared, v, squared, minus, 4, u, v, end color #ca337c
简化:
−5u2v2+5u2v+4uv2−4uvminus, 5, u, squared, v, squared, plus, 5, u, squared, v, plus, 4, u, v, squared, minus, 4, u, v
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练习
问题1
- 当前
简化.
(−2x4+7x2y−7)+(−9x3+7xy+7)left parenthesis, minus, 2, x, start superscript, 4, end superscript, plus, 7, x, squared, y, minus, 7, right parenthesis, plus, left parenthesis, minus, 9, x, cubed, plus, 7, x, y, plus, 7, right parenthesis
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