4b

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4b4b 4bTojoininmoreactivities.Bemorefriendlytoeachother.Tomakelessphonecallatnight.Totalkwithyo

4b
4b

4b
To join in more activities.
Be more friendly to each other.
To make less phone call at night.
To talk with your cousin about it.
To tell your parents about the advantages of keeping a pet.

不会

4b {a+b}²-4b{a+b}+4b² 计算：((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b) 已知5a=4b,求:(a-b)/b; (a+b)/b ;(a-b)/(a+b); 画画中使用的铅笔HB,2B,3B,4B,5B,6B,7B,8B. 画画中使用的铅笔HB,2B,3B,4B,5B,6B,7B,8B. 画画中使用的铅笔HB,2B,3B,4B,5B,6B,7B,8B. (b+2/b-2减b-2/b+2)÷b平方-2b/b+2,其中b平方+1=4b.化简求值计算：3a+4b/a-b+3b/b-a-4a/a-b a^2-b^2+b-1/4(a+b)(a-b)+4(b-1) a^2-b^2+4b =(a+b)*(a-b)+4b =2(a-b)+4b =2(a+b) =4 =(a+b)*(a-b)+4b =2(a-b)+4b怎么得的a^2-b^2+4b =(a+b)*(a-b)+4b =2(a-b)+4b =2(a+b) =4=(a+b)*(a-b)+4b =2(a-b)+4b怎么得的已知5a=4b,求a-b/b与a+b/b的值 a)b^2+4b-12 b)由此,因式分解24-8b-2b^2 计算a^2-b^2/a+b-4a(a-b)+b^2/2a-b (3a+b)4b-[(2a+b+a-b)b]/2 2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程化简【3A方-(A+B)(B-A)】【4(-B-A)(B-A)+5B方】已知4a=7b,求b/a-b,和(a+b)/(a-b)