Answer: -4x² + 5x - 28
Step-by-step explanation:
Given expression
3x² + 5x - 7 (x² + 4)
Expand parentheses and apply the distributive property
=3x² + 5x - 7x² - 28
Combine like terms
=(3x² - 7x²) + 5x - 28
=[tex]\boxed{-4x^2+5x-28}[/tex]
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