Solution assignment 05 Quadratic equations (factorizing)

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Assignment 5

Try to solve by factorization:

x^2-4x-45=0

Solution

We have to find p and q such that:

pq=-45 and p+q=-4

The following values will do:

p=-9 and q=5

Thus the equation can be written as:

(x-9)(x+5)=0

and thus the solutions are:

x=9 or x=-5

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