Toán Lớp 8: 1) x(x³-3x²)
3) 4y²/x³.x/2y
MN giúp mk vs ạ
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Toán Lớp 8: 1) x(x³-3x²)
3) 4y²/x³.x/2y
MN giúp mk vs ạ
Comments ( 2 )
Answer
1) x . (x^3 – 3x^2)
= x . x^3 – x . 3x^2
= x^4 – 3x^3
______________________
3) {4y^2}/x^3 . x/{2y}
= {4y^2 . x}/{x^3 . 2y}
= {2y}/{x^2}
Giải đáp:
1) x^4-3x^3
3) (2y)/(x^2)
Lời giải và giải thích chi tiết:
1) x(x^3-3x^2)
=x.x^3-x.3x^2
=x^4-3x^3
3) (4y^2)/(x^3).(x)/(2y)
=(4y^2.x)/(x^{3}.2y)
=(2y.2y.x)/(x.x^{2}.2y)
=(2y)/(x^2)