Factorize: x2 – 9x + 20 – InterviewSolution

1.	Factorize: x2 – 9x + 20
Answer» x² – 9x + 20 Now, first we have to find out the numbers whose Sum = - 9 and Product = 20 The numbers are 5 and 4, So, x² – 9x + 20 = x² – 5x – 4x + 20 = x(x – 5) – 4(x – 5) = (x – 5)(x – 4)

Factorize: x2 – 9x + 20

Answer»

x² – 9x + 20

Now, first we have to find out the numbers whose

Sum = - 9 and

Product = 20

The numbers are 5 and 4,

So,

x² – 9x + 20

= x² – 5x – 4x + 20

= x(x – 5) – 4(x – 5)

= (x – 5)(x – 4)