分解因式:我做完了,8(x²-2y²)-x(7x+y)+xy 4a四次方-64(5m²+3n²)²-(3m²+5n²)² x³+x²y-xy²-y³观察下列等式:4²-1²=3*5 5²-2²=3*7 6²-3²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/28 06:25:31
![分解因式:我做完了,8(x²-2y²)-x(7x+y)+xy 4a四次方-64(5m²+3n²)²-(3m²+5n²)² x³+x²y-xy²-y³观察下列等式:4²-1²=3*5 5²-2²=3*7 6²-3²](/uploads/image/z/1009131-51-1.jpg?t=%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%EF%BC%9A%E6%88%91%E5%81%9A%E5%AE%8C%E4%BA%86%2C8%EF%BC%88x%26%23178%3B-2y%26%23178%3B%EF%BC%89-x%EF%BC%887x%2By%EF%BC%89%2Bxy+4a%E5%9B%9B%E6%AC%A1%E6%96%B9-64%EF%BC%885m%26%23178%3B%2B3n%26%23178%3B%EF%BC%89%26%23178%3B-%EF%BC%883m%26%23178%3B%2B5n%26%23178%3B%EF%BC%89%26%23178%3B+x%26%23179%3B%2Bx%26%23178%3By-xy%26%23178%3B-y%26%23179%3B%E8%A7%82%E5%AF%9F%E4%B8%8B%E5%88%97%E7%AD%89%E5%BC%8F%EF%BC%9A4%26%23178%3B-1%26%23178%3B%3D3%2A5+5%26%23178%3B-2%26%23178%3B%3D3%2A7+6%26%23178%3B-3%26%23178%3B)
xSJ@ PLiD꾡ff.JvR uᢖ|dffBY+a9>ޙYQk>q7ny]%־#cz~[LlqS=e^/>%9
EvI7ڊu~Z\A2(TFL0?&KFm3SU{vy+1[Iiϼi
,`el8!0~H;b2y4(5k?^1V}4] @'dk*fÜ!JK#?bCm1)$_?`@_s` }8,"_1PPКĹBp($}6 30[9Y6f2!i֖v
分解因式:我做完了,8(x²-2y²)-x(7x+y)+xy 4a四次方-64(5m²+3n²)²-(3m²+5n²)² x³+x²y-xy²-y³观察下列等式:4²-1²=3*5 5²-2²=3*7 6²-3²
分解因式:我做完了,8(x²-2y²)-x(7x+y)+xy 4a四次方-64
(5m²+3n²)²-(3m²+5n²)² x³+x²y-xy²-y³
观察下列等式:4²-1²=3*5 5²-2²=3*7 6²-3²=3*9 ……
则第n(n是正整数)个等式为
分解因式:我做完了,8(x²-2y²)-x(7x+y)+xy 4a四次方-64(5m²+3n²)²-(3m²+5n²)² x³+x²y-xy²-y³观察下列等式:4²-1²=3*5 5²-2²=3*7 6²-3²
8(x²-2y²)-x(7x+y)+xy
=8x²-16y²-7x²-xy+xy
=x²-16y²
=(x+4y)(x-4y)
4a四次方-64
=4(a^4-16)
=4(a²+4)(a²-4)
=4(a²+4)(a+2)(a-2)
(5m²+3n²)²-(3m²+5n²)²
=[(5m²+3n²)+(3m²+5n²)][(5m²+3n²)-(3m²+5n²)]
=(8m²+8n²)(2m²-2n²)
=16(m²+n²)(m+n)(m-n)
x³+x²y-xy²-y³
=x²(x+y)-y²(x+y)
=(x+y)(x²-y²)
=(x+y)²(x-y)