几道关于完全平方的题目.1.(-1/4+3a)²2.(-2x-3y)²3.(2a-3b²)²4.(-3a-2b)²5.(x-2y)(x+2y)-(x+2y)²6.(x/2+5)²+(x/2-5)²7.(2x-y-1)(2x-y+1)8.(a+2b)(a-2b)(a²-4b²)
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![几道关于完全平方的题目.1.(-1/4+3a)²2.(-2x-3y)²3.(2a-3b²)²4.(-3a-2b)²5.(x-2y)(x+2y)-(x+2y)²6.(x/2+5)²+(x/2-5)²7.(2x-y-1)(2x-y+1)8.(a+2b)(a-2b)(a²-4b²)](/uploads/image/z/5455268-44-8.jpg?t=%E5%87%A0%E9%81%93%E5%85%B3%E4%BA%8E%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E7%9A%84%E9%A2%98%E7%9B%AE.1.%EF%BC%88-1%2F4%2B3a%29%26%23178%3B2.%EF%BC%88-2x-3y%29%26%23178%3B3.%EF%BC%882a-3b%26%23178%3B%29%26%23178%3B4.%EF%BC%88-3a-2b%29%26%23178%3B5.%EF%BC%88x-2y%29%28x%2B2y%29-%28x%2B2y%29%26%23178%3B6.%EF%BC%88x%2F2%2B5%29%26%23178%3B%2B%EF%BC%88x%2F2-5%29%26%23178%3B7.%EF%BC%882x-y-1%29%282x-y%2B1%298.%28a%2B2b%29%28a-2b%29%28a%26%23178%3B-4b%26%23178%3B%29)
几道关于完全平方的题目.1.(-1/4+3a)²2.(-2x-3y)²3.(2a-3b²)²4.(-3a-2b)²5.(x-2y)(x+2y)-(x+2y)²6.(x/2+5)²+(x/2-5)²7.(2x-y-1)(2x-y+1)8.(a+2b)(a-2b)(a²-4b²)
几道关于完全平方的题目.
1.(-1/4+3a)²
2.(-2x-3y)²
3.(2a-3b²)²
4.(-3a-2b)²
5.(x-2y)(x+2y)-(x+2y)²
6.(x/2+5)²+(x/2-5)²
7.(2x-y-1)(2x-y+1)
8.(a+2b)(a-2b)(a²-4b²)
几道关于完全平方的题目.1.(-1/4+3a)²2.(-2x-3y)²3.(2a-3b²)²4.(-3a-2b)²5.(x-2y)(x+2y)-(x+2y)²6.(x/2+5)²+(x/2-5)²7.(2x-y-1)(2x-y+1)8.(a+2b)(a-2b)(a²-4b²)
1.(-1/4+3a)²=1/16-3a/2+9a²
2.(-2x-3y)²=4x²+12xy+9y²
3.(2a-3b²)²=4a²-12ab²+9b^4
4.(-3a-2b)²=9a²+12ab+4b²
5.(x-2y)(x+2y)-(x+2y)²=x²+4y²-x²-4xy-4y²=-4xy
6.(x/2+5)²+(x/2-5)²=x²/4+5x+25+x²/4-5x+25=x²/2+50
7.(2x-y-1)(2x-y+1)=(2x-y)²-1²=4x²-4xy+y²-1
8.(a+2b)(a-2b)(a²-4b²)=(a²-4b²)(a²-4b²)=(a²-4b²)²=a^4-8a²b²+16b^4
这可是最先回答的哟.祝进步!
1. 1/16+9a^2-3/2a
2. 4x^2+9y^2+12xy
3. 4a^2+9b^4-12ab^2
4. 9a^2+4b^2+12ab
5. -8y^2-4xy
6. 0.5x^2+50
7. 4x^2+y^2-4xy-1
8. a^4+16b^4-8(ab)^2
看不懂你写的符号,&和#是什么意思