2 and 5 are coefficients of x and y respectively.
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The coefficients are a = 4, b = -3, c = -8. The discriminant is calculated with the formula b2 - 4ac, so just replace the coefficients in this formula.
Both. you must have the correct subscripts to represent the correct chemical then you only change the coefficients to balance the equation. The product of a coefficient and a subscript tells how many atoms are present.
The given polynomial does not have factors with rational coefficients.
Stoichiometry. You can compare the amounts of any materials in the same chemical equation using the formula weights and the coefficients of the materials in the equation.
3, 2, 2, 1