Q21 of 137 Page 102

Factorize:

a2 + 6a – 91

a2 + 6a – 91


Now, first we have to find out the numbers whose-


Sum = 6 and


Product = - 91


The numbers are 13 and 7,


So,


a2 + 6a – 91


= a2 + 13a – 7a – 91


= a(a + 13) – 7(a + 13)


= (a + 13) (a – 7)


More from this chapter

All 137 →
19

Factorize:

z2 + 19z – 150

 20

Factorize:

y2 + y – 72

 22

Factorize:

p2 – 4p – 77

 23

Factorize:

x2 – 7x – 30