2 years ago

−3x(−4x+x)−x(−x−2x)−4x(4x+3x)

1 answer:

7 0

Answer:

$- 3x( - 4x + x) - x( - x - 2x) - 4x(4x + 3x) \\ \\ = 12 {x}^{2} - 3 {x}^{2} + {x}^{2} + 2 {x}^{2} - 16 {x}^{2} - 12 {x}^{2} \\ \\ = - 16{x}^{2}$

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tigry1 [53]

Answer:

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Step-by-step explanation:

For $a=|b|$ , we have two cases:

$\begin{cases}a=b,\\a=-b\end{cases}$

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$\begin{cases}18=15-3x,\\18=-(15-3x)\end{cases}$

Solving, we have:

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