Solution assignment 18 Quadratic equations (factorizing)

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Assignment 18

Try to solve by factorizing:

x^2+5x+20=0

Solution

We have to find p and q such that:

pq=20 and p+q=5

There are no whole numbers p en q that satisfy these equations. This does not mean that there are no solutions. In this case the equation has no solutions because the discriminant D<0, see also Quadratic equations (abc-formula).

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