展开 sqrt(2.25-y^2)(1.5-y)

解答

展开

2.25 - y^{2} (1.5 - y)

1.5 2.25 - y^{2} - y 2.25 - y^{2}

求解步骤

2.25 - y^{2} (1.5 - y)

使用分配律:

a (b - c) = ab - a c

2.25 - y^{2} (1.5 - y) = 2.25 - y^{2} \cdot 1.5 - 2.25 - y^{2} y

= 2.25 - y^{2} \cdot 1.5 - 2.25 - y^{2} y

= 1.5 2.25 - y^{2} - y 2.25 - y^{2}

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