Asked by Alice
How else can you write x^2+4x-15?
Answers
Answered by
drwls
The roots of the equation x^2+4x-15 = 0 are
x = (1/2)[-4 +/- sqrt 76)
= -2 +/-sqrt 19
So the polynomial could be factored
to (x + 2 + sqrt19)(x + 2 - sqrt19)
x = (1/2)[-4 +/- sqrt 76)
= -2 +/-sqrt 19
So the polynomial could be factored
to (x + 2 + sqrt19)(x + 2 - sqrt19)
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