Factoring trinomials 10b × 2 + 17b + 3

(I'm assuming the first term is 10 b squared)

The first thing you need to know before diving in is to find the factors of 10 and 3.
10 = 1x10, 2x5
3 = 1x3

Next you will have to find a combination that when multiplied the middle term is 17. In this case it is 2x5 and 1x3. We can test it out by setting it up in binomials.

(2b + 3)(5b + 1) = 10b squared + 2b + 15b + 3 = 10b squared + 17b + 3.
The reason why the binomials are additions is because both the middle and end terms are positive.

Hope this helps!

The reporter forgot to multiply the decimal by 100, making it 25%