Question

b^2+14b+45

Answer 1

Hint: break down the middle term into factors of the last term

Answer 2

that seems not clear...think of addends of 14 that when multiplied results to 45

Answer 3

9*5

Answer 4

b^2 + 14b + 45 = (b+9)(b+5)

since: 9*5 = 45 and 9+5 = 14.