数学因式分解和计算题和填空题 一共5题 因式分解:a(x+y)-(a-b)(x+y)4(m-n)²-4(m²-n²)+(m+n)²填空题:计算:(x+7)(x+6)-(x-2)(x+1)=已知:a+b=4,ab=2,(a-b)²=
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![数学因式分解和计算题和填空题 一共5题 因式分解:a(x+y)-(a-b)(x+y)4(m-n)²-4(m²-n²)+(m+n)²填空题:计算:(x+7)(x+6)-(x-2)(x+1)=已知:a+b=4,ab=2,(a-b)²=](/uploads/image/z/11636996-68-6.jpg?t=%E6%95%B0%E5%AD%A6%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E5%92%8C%E8%AE%A1%E7%AE%97%E9%A2%98%E5%92%8C%E5%A1%AB%E7%A9%BA%E9%A2%98+%E4%B8%80%E5%85%B15%E9%A2%98+%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9Aa%EF%BC%88x%2By%EF%BC%89-%EF%BC%88a-b%EF%BC%89%EF%BC%88x%2By%EF%BC%894%EF%BC%88m-n%EF%BC%89%26%23178%3B-4%EF%BC%88m%26%23178%3B-n%26%23178%3B%EF%BC%89%2B%EF%BC%88m%2Bn%EF%BC%89%26%23178%3B%E5%A1%AB%E7%A9%BA%E9%A2%98%EF%BC%9A%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%88x%2B7%EF%BC%89%EF%BC%88x%2B6%EF%BC%89-%EF%BC%88x-2%EF%BC%89%EF%BC%88x%2B1%EF%BC%89%3D%E5%B7%B2%E7%9F%A5%EF%BC%9Aa%2Bb%3D4%2Cab%3D2%2C%EF%BC%88a-b%EF%BC%89%26%23178%3B%3D)
数学因式分解和计算题和填空题 一共5题 因式分解:a(x+y)-(a-b)(x+y)4(m-n)²-4(m²-n²)+(m+n)²填空题:计算:(x+7)(x+6)-(x-2)(x+1)=已知:a+b=4,ab=2,(a-b)²=
数学因式分解和计算题和填空题 一共5题
因式分解:
a(x+y)-(a-b)(x+y)
4(m-n)²-4(m²-n²)+(m+n)²
填空题:
计算:(x+7)(x+6)-(x-2)(x+1)=
已知:a+b=4,ab=2,(a-b)²=
计算题:
(x-2y+z)(x+2y-z)
数学因式分解和计算题和填空题 一共5题 因式分解:a(x+y)-(a-b)(x+y)4(m-n)²-4(m²-n²)+(m+n)²填空题:计算:(x+7)(x+6)-(x-2)(x+1)=已知:a+b=4,ab=2,(a-b)²=
a(x+y)-(a-b)(x+y)
=(x+y)(a-a+b)
=b(x+y)
4(m-n)²-4(m²-n²)+(m+n)²
=[2(m-n)-(m+n)]²
=(m-3n)²
填空题:
计算:(x+7)(x+6)-(x-2)(x+1)
=x²+13x+42-(x²-x-2)
=14x+44
已知:a+b=4,ab=2,(a-b)²=(a+b)²-4ab=16-8=8
计算题:
(x-2y+z)(x+2y-z)
=[x-(2y-z)[x+(2y-z)]
=x²-(2y-z)²
=x²-(4y²-4yz+z²)
=x²-4y²+4yz-z²
1.解原式=(a-a+b)(x=y)=b(x+y)
a(x+y)-(a-b)(x+y)=(x+y)(a-a+b)=b(x+y)=bx+by
4(m-n)²-4(m²-n²)+(m+n)²=4m²-8mn+4n²-4m²+4n²+m²+2mn+n²
=m²-6mn+9...
全部展开
a(x+y)-(a-b)(x+y)=(x+y)(a-a+b)=b(x+y)=bx+by
4(m-n)²-4(m²-n²)+(m+n)²=4m²-8mn+4n²-4m²+4n²+m²+2mn+n²
=m²-6mn+9n²
填空题:
计算:(x+7)(x+6)-(x-2)(x+1)=x²+13x+42-x²+x+2=14x+44
已知:a+b=4,ab=2,(a-b)²=(a+b)²-4ab=4²-4×2=8
计算题:
(x-2y+z)(x+2y-z)=[X-(2y-z)][x+(2y-z)]=x²-2x(2y-z)+(2y-z)²
=x²-4xy+2xz+4y²-4yz+z²
收起
(x+y)-(a-b)(x+y)
=(x+y)(a-a+b)
=b(x+y)
4(m-n)²-4(m²-n²)+(m+n)²
=[2(m-n)-(m+n)]²
=(m-3n)²
填空题:
计算:(x+7)(x+6)-(x-2)(x+1)
=x²+13x+42-(x&...
全部展开
(x+y)-(a-b)(x+y)
=(x+y)(a-a+b)
=b(x+y)
4(m-n)²-4(m²-n²)+(m+n)²
=[2(m-n)-(m+n)]²
=(m-3n)²
填空题:
计算:(x+7)(x+6)-(x-2)(x+1)
=x²+13x+42-(x²-x-2)
=14x+44
已知:a+b=4,ab=2,(a-b)²=(a+b)²-4ab=16-8=8
收起
(x+y)(a-a+b)=b(x+y) 4(m-n)²-4(m²-n²)+(m+n)²=4(m-n)²-4(m+n)(m-n)+(m+n)²=4(m-n+m+n)²=16m² 14x+41 8 最后一题看图片啊