Question

这是4题，如果你帮我解答，我会重赏你财富值为100，谢谢，我等你的好消息，我会答应你的一个条件

先化简，再求值：1、（3a+2b)(3a-2b)+(a-2b)的平方，其中a=-五分之一，b=1
2、【（x+四分之一y)的平方-（x-四分之一y)的平方】（3x-三分之一y)（三分之一y+3x)(九分之一y的平方+9x的平方），其中x=1,Y=-3
解方程或不等式：1、9（x-3)(x+4)=(2x-1)(2x+1)+5（x-2)的平方
2、2（2x-3）的平方-3(x-2)＞8x的平方-3（x+4)
道题目，算出一题并对的话，一题给10分，谢谢，请快恢复，智者先！必有重赏

Answer 1

第一题：（3a+2b)(3a-2b)+(a-2b)
=（-3/5+2)(-3/5-2)+(-1/5-2)
=7/5×13/5+11/5
=61/5+11/5
=72/5
第二题：原式=【（1+3/4）的平方-（1-3/4）的平方】（3-1）（1+3） （1/3的平方+81）
=（49/16-1/16）×2×4×730/9
=24×730/9
=584/3
方程和不等式不会，因为我还没上初中。

Answer 2

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Answer 3

1.化简：10a^2-4ab :6/5
2.81yx^5-1/81xy^5 :-240
3.X=127/29
4.x<1.5

追问

完整步骤，我会加分，回答得很好，是个高手啊

Answer 4

就是利用平方差公式。