(a-根号3)(a+根号3)-a(a-6) 先化简,再求值!将a=2代入 计算:mx的平方-6mx+9m= 3ab+a的平方b= x的平方y-xy的平方= 4x的平方-4= ax平方+2axy+ay的平方= x的平方-2xy+y的平方= (a+b)(a-b)=
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![(a-根号3)(a+根号3)-a(a-6) 先化简,再求值!将a=2代入 计算:mx的平方-6mx+9m= 3ab+a的平方b= x的平方y-xy的平方= 4x的平方-4= ax平方+2axy+ay的平方= x的平方-2xy+y的平方= (a+b)(a-b)=](/uploads/image/z/1344482-26-2.jpg?t=%28a-%E6%A0%B9%E5%8F%B73%EF%BC%89%EF%BC%88a%2B%E6%A0%B9%E5%8F%B73%EF%BC%89-a%28a-6%29+%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%21%E5%B0%86a%3D2%E4%BB%A3%E5%85%A5+%E8%AE%A1%E7%AE%97%EF%BC%9Amx%E7%9A%84%E5%B9%B3%E6%96%B9-6mx%2B9m%3D+3ab%2Ba%E7%9A%84%E5%B9%B3%E6%96%B9b%3D+x%E7%9A%84%E5%B9%B3%E6%96%B9y-xy%E7%9A%84%E5%B9%B3%E6%96%B9%3D+4x%E7%9A%84%E5%B9%B3%E6%96%B9-4%3D+ax%E5%B9%B3%E6%96%B9%2B2axy%2Bay%E7%9A%84%E5%B9%B3%E6%96%B9%3D+x%E7%9A%84%E5%B9%B3%E6%96%B9-2xy%2By%E7%9A%84%E5%B9%B3%E6%96%B9%3D+%EF%BC%88a%2Bb%29%28a-b%29%3D)
(a-根号3)(a+根号3)-a(a-6) 先化简,再求值!将a=2代入 计算:mx的平方-6mx+9m= 3ab+a的平方b= x的平方y-xy的平方= 4x的平方-4= ax平方+2axy+ay的平方= x的平方-2xy+y的平方= (a+b)(a-b)=
(a-根号3)(a+根号3)-a(a-6) 先化简,再求值!将a=2代入
计算:mx的平方-6mx+9m= 3ab+a的平方b= x的平方y-xy的平方= 4x的平方-4= ax平方+2axy+ay的平方= x的平方-2xy+y的平方= (a+b)(a-b)=
(a-根号3)(a+根号3)-a(a-6) 先化简,再求值!将a=2代入 计算:mx的平方-6mx+9m= 3ab+a的平方b= x的平方y-xy的平方= 4x的平方-4= ax平方+2axy+ay的平方= x的平方-2xy+y的平方= (a+b)(a-b)=
(a-根号3)(a+根号3)-a(a-6)
=a²-3-a²+6a
=-3+6a
=-3+12=9
mx的平方-6mx+9m= m(x²-6x+9)=m(x-3)²
3ab+a的平方b=ab(3+a)
x的平方y-xy的平方=xy(x-y)
4x的平方-4=4(x²-1)=4(x+1)(x-1)
ax平方+2axy+ay的平方= a(x²+2xy+y²)=a(x+y)²
x的平方-2xy+y的平方= (x-y)²
(a+b)(a-b)= a²-b²
(a-√3)(a+√3)-a(a-6)
=a^2-3-a^2+6a
=6a-3
=6*2-3
=12-3
=9
mx^2-6mx+9m
=m(x^2-6x+9)
=m(x-3)
3ab+a^2b
=ab(3+a)
x^2y-xy^2
=xy(x-y)
4x^2-4
=4(x^2-1)<...
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(a-√3)(a+√3)-a(a-6)
=a^2-3-a^2+6a
=6a-3
=6*2-3
=12-3
=9
mx^2-6mx+9m
=m(x^2-6x+9)
=m(x-3)
3ab+a^2b
=ab(3+a)
x^2y-xy^2
=xy(x-y)
4x^2-4
=4(x^2-1)
=4(x+1)(x-1)
ax^2+2axy+ay^2
=a(x^2+2xy+y^2)
=a(x+y)^2
x^2-2xy+y^2
=(x-y)^2
(a+b)(a-b)
=a^2-b^2
收起
(a-根号3)(a+根号3)-a(a-6) =a^2-3-a^2+6a=6a-3 a=2 6a-3=9
mx的平方-6mx+9m= m(x-3)^2
3ab+a的平方b=ab((3+a)
x的平方y-xy的平方=xy(x-y)
4x的平方-4 =4(x+1)(x-1)
ax平方+2axy+ay的平方=a(x+y)^2
x的平方-2xy...
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(a-根号3)(a+根号3)-a(a-6) =a^2-3-a^2+6a=6a-3 a=2 6a-3=9
mx的平方-6mx+9m= m(x-3)^2
3ab+a的平方b=ab((3+a)
x的平方y-xy的平方=xy(x-y)
4x的平方-4 =4(x+1)(x-1)
ax平方+2axy+ay的平方=a(x+y)^2
x的平方-2xy+y的平方=(x-y)^2
(a+b)(a-b)=a^2-b^2
收起
mx^2-6mx+9m= m(x-3)^2 3ab+a^2b= ab(3+a) x^2y-xy^2=xy(x-y)
4x^2-4=4(x-1)(x+1) ax^2+2axy+ay^2=a(x+y)^2
x^2-2xy+y^2=(x-y)^2 (a+b)(a-b)= a^2-b^2
化简为6a-3, 值为9 计算mx²-6mx+9m=m(x-3)² 3ab+a²b=ab(3+a) x²y-xy²=xy(x-y) 4x²-4=4(x²-1)=4(x+1)(x-1) ax²+2axy+ay²=a(x+y)² x²-2xy+y...
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化简为6a-3, 值为9 计算mx²-6mx+9m=m(x-3)² 3ab+a²b=ab(3+a) x²y-xy²=xy(x-y) 4x²-4=4(x²-1)=4(x+1)(x-1) ax²+2axy+ay²=a(x+y)² x²-2xy+y²=(x-y)² (a+b)(a-b)=a²-b²
收起
mx的平方-6mx+9m= m(x^2-6X+9)=m*(x-3)^2
3ab+a的平方b= ab(3+a)
x的平方y-xy的平方= xy(x-y)
4x的平方-4= 4(x^2-1)=4(x+1)(x-1)
ax平方+2axy+ay的平方= a(x^2+2xy+y^2)=a(x+y)^2
(a+b)(a-b)=a^2-b^2
(a-根号3)(a+根号3)-a(a-6)=a^2-3-a^2+6a=6a-3=6*2-3=9