①(-2r²s)²÷4rs²
问题描述:
①(-2r²s)²÷4rs²
②(5x²y^3)²÷25x^4y^5
③(x+y)^3÷(x+y)
④7a^5b^3c^5÷14a²b^3c
⑤8a^4b^3c÷2a²b^3×(-2/3a^3bc²)
⑥(3x²y)²×(-15xy^3)÷(-9x^4y²)
⑦(5m³n²-6m²)÷3m
答
①(-2r²s)²÷4rs²=r^3②(5x²y^3)²÷25x^4y^5=y③(x+y)^3÷(x+y)=(x+y)²④7a^5b^3c^5÷14a²b^3c=a^3c^4/2⑤8a^4b^3c÷2a²b^3×(-2/3a^3bc²)=-8/3a^5bc^3⑥...