49(a-b)方-16(a+b)方 分解因式1.49(a-b)方-16(a+b)方2.(2x+y)方-(x+2y)方3.(x²+y²)²-x²y²4.(m+n)²-n²5.3ax²-3ay的四次方
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![49(a-b)方-16(a+b)方 分解因式1.49(a-b)方-16(a+b)方2.(2x+y)方-(x+2y)方3.(x²+y²)²-x²y²4.(m+n)²-n²5.3ax²-3ay的四次方](/uploads/image/z/2523026-2-6.jpg?t=49%28a-b%29%E6%96%B9-16%EF%BC%88a%2Bb%EF%BC%89%E6%96%B9+%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F1.49%28a-b%29%E6%96%B9-16%EF%BC%88a%2Bb%EF%BC%89%E6%96%B92.%EF%BC%882x%2By%EF%BC%89%E6%96%B9-%EF%BC%88x%2B2y%EF%BC%89%E6%96%B93.%EF%BC%88x%26sup2%3B%2By%26sup2%3B%EF%BC%89%26sup2%3B-x%26sup2%3By%26sup2%3B4.%EF%BC%88m%2Bn%EF%BC%89%26sup2%3B-n%26sup2%3B5.3ax%26sup2%3B-3ay%E7%9A%84%E5%9B%9B%E6%AC%A1%E6%96%B9)
49(a-b)方-16(a+b)方 分解因式1.49(a-b)方-16(a+b)方2.(2x+y)方-(x+2y)方3.(x²+y²)²-x²y²4.(m+n)²-n²5.3ax²-3ay的四次方
49(a-b)方-16(a+b)方 分解因式
1.49(a-b)方-16(a+b)方
2.(2x+y)方-(x+2y)方
3.(x²+y²)²-x²y²
4.(m+n)²-n²
5.3ax²-3ay的四次方
49(a-b)方-16(a+b)方 分解因式1.49(a-b)方-16(a+b)方2.(2x+y)方-(x+2y)方3.(x²+y²)²-x²y²4.(m+n)²-n²5.3ax²-3ay的四次方
1.49(a-b)方-16(a+b)方
=(7(a-b)+4(a+b))(7(a-b)-4(a+b))
=(11a-3b)(3a-11b)
2.(2x+y)方-(x+2y)方
=[(2x+y)+(x+2y)][(2x+y)-(x+2y)]
=(3x+3y)(x-y)
=3(x+y)(x-y)
=3x^2-3y^2
3.(x²+y²)²-x²y²
=(x^2+y^2+xy)(x^2+y^2-xy)
4.(m+n)²-n²
=(m+n+n)(m+n-n)
=(m+2n)m
5.3ax²-3ay的四次方
=3a(x^2-y^4)
=3a(x+y^2)(x-y^2)
1.[7(a-b)-4(a+b)]*[7(a-b)+4(a+b)]=(3a-11b)(11a-3b)
2.(2x+y-x-2y)(2x+y+x+2y)=(x-y)(3x+3y)=3(x+y)(x-y)
3.(x²+y²-xy)(x²+y²+xy)
4.(m+n+n)(m+n-n)=m(m+2n)
5.3a(x-y²)(x+y²)
用完全平方公式算,结果不能跟你说!
公式是:(a+b)²=a²+2ab+b²
(a-b)²=a²-2ab+b²
代入自己求
1.49(a-b)方-16(a+b)方
=[7(a-b)+4(a+b)][7(a-b)-4(a+b)]
=(11a-3b)(3a-11b)
=33(a^2+b^2)-130ab
2.(2x+y)方-(x+2y)方
=(2x+y+x+2y)(2x+y-x-2y)
=3(x+y)(x-y)
=3(x^2-y^2)
3.(x²...
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1.49(a-b)方-16(a+b)方
=[7(a-b)+4(a+b)][7(a-b)-4(a+b)]
=(11a-3b)(3a-11b)
=33(a^2+b^2)-130ab
2.(2x+y)方-(x+2y)方
=(2x+y+x+2y)(2x+y-x-2y)
=3(x+y)(x-y)
=3(x^2-y^2)
3.(x²+y²)²-x²y²
(x^2+y^2+xy)(x^2+y^2-xy)
4.(m+n)²-n²
=(m+n+n)(m+n-n)
=m(m+2n)
5.3ax²-3ay的四次方
=3a(x+y^2)(x-y^2)
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1.49(a-b)²-16(a+b)²
=49(a-b)(a+b)-16(a+b)²
=(a+b)(33a-65b)
2.(2x+y)²-(x+2y)²
=(2x+y+x+2y)(2x+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y)
3.(x²+y&s...
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1.49(a-b)²-16(a+b)²
=49(a-b)(a+b)-16(a+b)²
=(a+b)(33a-65b)
2.(2x+y)²-(x+2y)²
=(2x+y+x+2y)(2x+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y)
3.(x²+y²)²-x²y²
=(x²+y²+xy)(x²+y²-xy)
4.(m+n)²-n²
=(m+n+n)(m+n-n)
=m(m+2n)
5. 3ax²-3ay的四次方
=81a的四次方(x²-y)的四次方
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