How do you factor #x= y^2-21y-63 #?
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"What does Hess's law say about the enthalpy of a reaction?"
1 Answer
Jul 30, 2016
can't be factored
Explanation:
f(y) = y^2 - 21y - 63
D = b^2 - 4ac = 441 + 252 = 693.
Since D is not a perfect square, f(y) can't be factored.
