Answer:
A) 34x²
Step-by-step explanation:
6x * 7x = 42x²
2x * 4x = 8x²
42x - 8 x = 34x²
At most means less than or equal to:
7 + x ≤ 20
-7x² + 70x - 175
= -7(x² - 10x + 25)
= -7(x - 5)²
= -7(x + -5)²
Answer: -5
