X² - 4x - 77 = 0
( x + 7) ( x - 11)
x + 7 = 0
x - 11 = 0
x = -7
x = 11
Answer:
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Step-by-step explanation:
Answer part A:
-6°F
Answer part B:
-7,5°F
Step-by-step explanation:
- A: 7-13= -6
- B: 11-5= 6 ==> 6*(-1,25)= - 7,5
