Toán Lớp 8: Bài 1:
a) 2x/3÷5/6x^2
b) 16x^2y^2÷(-18x^2y^5/5)
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Toán Lớp 8: Bài 1:
a) 2x/3÷5/6x^2
b) 16x^2y^2÷(-18x^2y^5/5)
Comments ( 2 )
a)2x/3 : 5/6x²= 2x/3 . 6x²/5=12x³/15
b)16x²y²÷(-18x²y^5 /5)= 16x²y² . 5/ ( -18x²y^5)= 80x²y²/ -18x²y^5)=80y³/-18
b)16x²y²÷(-18x²y^5 /5)= $\frac{16x²y² . 5}{-18x²y^5}$= $\frac{80x²y²}{-18x²y^5}$=$\frac{80y³}{-18}$=$\frac{-40y³}{9}$