求解 -7+4(-2) | Microsoft Math Solver

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- 7 + 4 (- 2)

= - 15

求值

- 15

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因式分解

- 15

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测验

- 7 + 4 (- 2)

视频

Subtracting: three digit numbers and basic regrouping | Arithmetic | Khan Academy

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已复制到剪贴板

-7-8

将 4 与 -2 相乘，得到 -8。

-15

将 -7 减去 8，得到 -15。

示例

二次方程式

x^{2} - 4 x - 5 = 0

4 sin θ cos θ = 2 sin θ

y = 3 x + 4

699 * 533

[2534] [2 - 1 0135]

{8 x + 2 y = 46 7 x + 3 y = 47

\frac{d}{d x} \frac{( 3 x ^{2} - 2 )}{( x - 5 )}

\int_{0}^{1} x e^{- x^{2}} d x

x \to - 3 lim \frac{x ^{2} - 9}{x ^{2} + 2 x - 3}