Answer:
To collect like terms, we need to combine the terms that have the same variable and the same exponent.
2x + 12x² - 5x
= (2x - 5x) + 12x² (grouping the x terms)
= -3x + 12x² (combining the x terms)
Therefore, the collected like terms for 2x + 12x² - 5x is -3x + 12x².
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Explanation: