Ms. Oliveda bought a grapefruit for .89c and three oranges. The total cost of the fruit was $2.15. How much did each orange cost
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Quadratic formula is
'a' is the coefficient of x^2 = 4
'b' is the coefficient of x = 2
'c' is the constant = -1
Now we plug in all the values in quadratic formula
The above one is the substitution of values of a,b,c in quadratic formula.