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Find (x^3-12*x^2-42)+(x^2+x-3)

Solution:
Your problem `->` (x^3-12*x^2-42)+(x^2+x-3)


(x3-12x2-42) + (x2+x-3)
= x3 - 12x2 - 42 + x2 + x - 3
= x3 - 12x2 + x2 + x - 42 - 3
= x3 - 11x2 + x - 45

OR
```x^3``-``12x^2``+``0x``-``42`
+```x^2``+``x``-``3`

```x^3``-``11x^2``+``x``-``45`







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