几道初中数学题(分解因式)b²-(a-b+c)²4a²-(b+c)²(x+2y)(x-2y)-x-2yx-1-(1-x)(2-x)-15xy-20xya²b+5ab-b²9m²-144n²8a²-1/4b²y²+y+1/4我要是会还用得着上这问来!我们才刚学,
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![几道初中数学题(分解因式)b²-(a-b+c)²4a²-(b+c)²(x+2y)(x-2y)-x-2yx-1-(1-x)(2-x)-15xy-20xya²b+5ab-b²9m²-144n²8a²-1/4b²y²+y+1/4我要是会还用得着上这问来!我们才刚学,](/uploads/image/z/7178788-28-8.jpg?t=%E5%87%A0%E9%81%93%E5%88%9D%E4%B8%AD%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%EF%BC%89b%26sup2%3B-%28a-b%2Bc%29%26sup2%3B4a%26sup2%3B-%28b%2Bc%29%26sup2%3B%28x%2B2y%29%28x-2y%29-x-2yx-1-%281-x%29%282-x%29-15xy-20xya%26sup2%3Bb%2B5ab-b%26sup2%3B9m%26sup2%3B-144n%26sup2%3B8a%26sup2%3B-1%2F4b%26sup2%3By%26sup2%3B%2By%2B1%2F4%E6%88%91%E8%A6%81%E6%98%AF%E4%BC%9A%E8%BF%98%E7%94%A8%E5%BE%97%E7%9D%80%E4%B8%8A%E8%BF%99%E9%97%AE%E6%9D%A5%EF%BC%81%E6%88%91%E4%BB%AC%E6%89%8D%E5%88%9A%E5%AD%A6%EF%BC%8C)
几道初中数学题(分解因式)b²-(a-b+c)²4a²-(b+c)²(x+2y)(x-2y)-x-2yx-1-(1-x)(2-x)-15xy-20xya²b+5ab-b²9m²-144n²8a²-1/4b²y²+y+1/4我要是会还用得着上这问来!我们才刚学,
几道初中数学题(分解因式)
b²-(a-b+c)²
4a²-(b+c)²
(x+2y)(x-2y)-x-2y
x-1-(1-x)(2-x)
-15xy-20xy
a²b+5ab-b²
9m²-144n²
8a²-1/4b²
y²+y+1/4
我要是会还用得着上这问来!我们才刚学,我爸妈今天不在家,明天语文老师还要检查,错就打,你以为我愿意啊!不愿意帮忙就滚一边去,哪凉快哪呆着去,用不着在这说风凉话!
几道初中数学题(分解因式)b²-(a-b+c)²4a²-(b+c)²(x+2y)(x-2y)-x-2yx-1-(1-x)(2-x)-15xy-20xya²b+5ab-b²9m²-144n²8a²-1/4b²y²+y+1/4我要是会还用得着上这问来!我们才刚学,
第一题:平方差公式(a+c)(2b-a-c)
第二题,平方差公式(2a+b+c)(2a-b-c)
第三题:提工因:(x+2y)的平方乘以(x-2y)
第四题:提工因:(x-1)的平方乘以(x+1)
第五题:同上:-35xy
第六题:提工因b(a方-5a-b)
第七题:平方差 (3m+12n)(3-12n)
提工因 3(m+4n)(m-4n)
第八题:平方差(且在实数范围内求解):(根号8+1/2)(根号8-1/2)
第九题:完全平方式:(Y+1/2)的平方
算的有些着急,有错误请指出
1:-(a + c)*(a - 2*b + c)
2:(2*a - b - c)*(2*a + b + c)
3:(x - 2*y - 1)*(x + 2*y)
4:-(x - 1)*(x - 3)
5:(-35)*x*y
6:b*(a^2 + 5*a - b)
7:9*(m - 4*n)*(m + 4*n)
8:(32*a^2 - b^2)/4
9:(2*y + 1)^2/4
b²-(a-b+c)²=(b+a-b+c)(b-a+b-c)=(a+c)(2b-a-c)
4a²-(b+c)²=(4a+b+c)(4a-b-c)
(x+2y)(x-2y)-x-2y=(x+2y)(x-2y)-(x+2y)=(x+2y)(x-2y-1)
x-1-(1-x)(2-x)=(x-1)+(x-1)(2-x)=(x-1)(2-x+...
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b²-(a-b+c)²=(b+a-b+c)(b-a+b-c)=(a+c)(2b-a-c)
4a²-(b+c)²=(4a+b+c)(4a-b-c)
(x+2y)(x-2y)-x-2y=(x+2y)(x-2y)-(x+2y)=(x+2y)(x-2y-1)
x-1-(1-x)(2-x)=(x-1)+(x-1)(2-x)=(x-1)(2-x+1)=(x-1)(3-x)
-15xy-20xy=-35xy
a²b+5ab-b²=a(a+5b)-b²
9m²-144n²=(3m+12n)(3m-12n)
8a²-1/4b²=(4a+1/2b)(4a-1/2b)
y²+y+1/4=(y+1/2)²
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