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Andrej [43]
3 years ago
10

−3a2 − b3 + 3c2 − 2b3 if a = 2, b = −1, and c = 3.

Mathematics
1 answer:
levacccp [35]3 years ago
5 0
<span><span><span><span><span>(<span><span>(<span>−3</span>)</span><span>(2)</span></span>)</span><span>(2)</span></span>−<span><span>(<span>−1</span>)</span><span>(3)</span></span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span><span>=<span><span><span><span><span>(<span>−6</span>)</span><span>(2)</span></span>−<span><span>(<span>−1</span>)</span><span>(3)</span></span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span><span><span><span>−12</span>−<span><span>(<span>−1</span>)</span><span>(3)</span></span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)</span></span></span></span><span>=<span><span><span><span>−12</span>−<span>(<span>−3</span>)</span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)


</span></span></span></span><span>=<span><span><span>−9</span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span><span><span>−9</span>+<span><span>(9)</span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span><span><span>−9</span>+18</span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span>9−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span>9−<span><span>(<span>−2</span>)</span><span>(3)

</span></span></span></span><span>=<span>9−<span>(<span>−6</span>)

</span></span></span><span>=<span>15</span></span>
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