(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)
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(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