展开 2646(s+s')^2

解答

展开

2646 (s + s^{'})^{2}

2646 s^{2} + 5292 ss' + 2646 (s')^{2}

求解步骤

2646 (s + s^{'})^{2}

(s + s^{'})^{2} = s^{2} + 2 s s^{'} + (s^{'})^{2}

= 2646 (s^{2} + 2 s s^{^{'}} + (s^{^{'}})^{2})

打开括号

= 2646 s^{2} + 2646 \cdot 2 s s^{^{'}} + 2646 (s^{^{'}})^{2}

数字相乘:

2646 \cdot 2 = 5292

= 2646 s^{2} + 5292 s s^{^{'}} + 2646 (s^{^{'}})^{2}

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e x p an d \frac{d ^{2}}{d x ^{2}} ((sin (x))^{2}) - 2 (1 - cos (x))

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