Question

B^2+20b+99
what is the answer? ​

Answer 1

Explanation:

b^2+20b+99

D = b^2 - 4ac = 400 - 99 * 4 = 4

b1 and 2 = -20 +- 2 / 2 = -9 and - 11

b1 = - 9

b2 = - 11

or

b2 + 20b + 99

u can ===>

b2 + 11b + 9b + 99

b(b + 11) + 9(b+11)

(b+9)(b+11)

and

b = - 9

b = - 11