The quadratic formula is the result of completing the square for ax^2+bx+c=0 when a,b, and c are unknown values. This result is:
x=(-b±√(b^2-4ac))/(2a), we have x^2-x-2=0 so
x=(1±√(1+8))/2
x=(1±√9)/2
x=(1±3)/2
x=-1 and 2
Answer:
(3x+2)(x+5)
Step-by-step explanation:
Answer:
1 lap in 8/10 (4/5) of a minute
Answer is B, 8/10 minute!
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Step-by-step explanation:
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