4x²-12x+9=5
4x²-12x+4=0
x= 12±√(144-4*4*4) / 2*4
x= 12 ± √(144-64) / 8
x=12±√80. /. 8
x= 12+4√5. /8
x=3±√5 / 2. C and E
Answer:
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Step-by-step explanation:
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Answer:
P (0) =100%
Step-by-step explanation:
Answer:
2 hours
Step-by-step explanation:
270 = (70+65) * t
270= 135t
t = 2
