Answer:
17. A
18. B
Step-by-step explanation:
Factor by grouping is the method used to factor expressions with 4 terms by separating pairs of terms with parenthesis. Within each pair of parenthesis, factor using GCF. You should have two repeating factors within the parenthesis which shows the factoring is complete.
17.
[tex]3x^2 + 15x + 2x + 10\\(3x^2 + 15x) + (2x + 10)\\3x(x+5) + 2(x+5)\\(3x+2)(x+5)[/tex]
18.
[tex]9b^3 + 3b^2 + 24b + 8\\(9b^3 + 3b^2) + (24b + 8)\\3b^2(3b + 1) + 8(3b+ 1)\\(3b^2 + 8)(3b+1)[/tex]
