Step-by-step explanation:
[tex](4 {x}^{2} - 3x - 4) - (3 {x}^{2} + 4x - 8) \\ \\ = 4 {x}^{2} - 3x - 4 - 3 {x}^{2} - 4x + 8 \\ \\ = 4 {x}^{2} - 3 {x}^{2} - 3x - 4x - 4 + 8 \\ \\ = {x}^{2} - 7x + 4[/tex]
Thus option B is the correct answer.
Answer:
B
Given
(4x² - 3x - 4) - (3x² + 4x - 8) ← distribute by - 1
= 4x² - 3x - 4 - 3x² - 4x + 8 ← collect like terms
= x² - 7x + 4 → B
