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:
The final price would be $26.95
Step-by-step explanation:
Answer:
Step-by-step explanation:
volume=area of side triangle×distsnce between triangles
=1/2×20×8×5
=400 in³
Answer:
32 dollars
Step-by-step explanation:
Let's say the original price is x
Create an equation:

Add 5 on both sides

x = 32
The answer is 32 dollars
Hope this helps :)
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