因式分解。配方法=完全平方公式+平方差公式,
例如4x²+3x-7=(16x²+12x-28)/4
=(64x²+48x-112)/16=((8x)²+2(8x)*3+9-9-112)/16
=((8x+3)²-11²)/16=(8x+3+11)(8x+3-11)/16
=(8x+14)(8x-8)/16=2(4x+7)*8(x-1)/16
=(4x+7)(x-1)。
不定积分 结果不唯一求导验证应该能够提高凑微分的计算能力先写别问唉。
室内踱步默念步数满一百就弯曲一个手指可以增强计算能力。
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