(1)5a²b÷(-三分之一ab)×2ab²(2){(x+2y)²-(x+y)(x-y)-5y²}÷2x(3)(-3.6×10的十次方)÷(-2×10²)²(4)(2a-b+3)(2a-3+b)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 00:23:39
![(1)5a²b÷(-三分之一ab)×2ab²(2){(x+2y)²-(x+y)(x-y)-5y²}÷2x(3)(-3.6×10的十次方)÷(-2×10²)²(4)(2a-b+3)(2a-3+b)](/uploads/image/z/5911988-68-8.jpg?t=%EF%BC%881%EF%BC%895a%26%23178%3Bb%C3%B7%28-%E4%B8%89%E5%88%86%E4%B9%8B%E4%B8%80ab%29%C3%972ab%26%23178%3B%EF%BC%882%EF%BC%89%EF%BD%9B%EF%BC%88x%2B2y%29%26%23178%3B-%28x%2By%29%28x-y%29-5y%26%23178%3B%EF%BD%9D%C3%B72x%EF%BC%883%EF%BC%89%28-3.6%C3%9710%E7%9A%84%E5%8D%81%E6%AC%A1%E6%96%B9%EF%BC%89%C3%B7%EF%BC%88-2%C3%9710%26%23178%3B%EF%BC%89%26%23178%3B%EF%BC%884%EF%BC%89%EF%BC%882a-b%2B3%29%282a-3%2Bb%29)
(1)5a²b÷(-三分之一ab)×2ab²(2){(x+2y)²-(x+y)(x-y)-5y²}÷2x(3)(-3.6×10的十次方)÷(-2×10²)²(4)(2a-b+3)(2a-3+b)
(1)5a²b÷(-三分之一ab)×2ab²
(2){(x+2y)²-(x+y)(x-y)-5y²}÷2x
(3)(-3.6×10的十次方)÷(-2×10²)²
(4)(2a-b+3)(2a-3+b)
(1)5a²b÷(-三分之一ab)×2ab²(2){(x+2y)²-(x+y)(x-y)-5y²}÷2x(3)(-3.6×10的十次方)÷(-2×10²)²(4)(2a-b+3)(2a-3+b)
解
5a²b÷(-1/3ab)×2ab²
=5a²b×(-3ab)×2ab²
=[5×(-3)×2]a^4b^4
=-30a^4b^4
[(x+2y)²-(x+y)(x-y)-5y²]÷2x
=(x²+4xy+4y²-x²+y²-5y²)÷2x
=(4xy)÷2x
=2y
(-3.6×10^10)÷(-2×10²)²
=(-3.6×10^10)÷(4×10^4)
=-0.9×10^6
(2a-b+3)(2a-3+b)
=[2a-(b-3)][2a+(b-3)]
=(2a)²-(b-3)²
=4a²-b²+6b-9
(1)30a^2b^2 (2)2y (3)-0.9*10^6 (4)4a^2-b^2+6b-9