Question

b*b +8b +15 pls help me out with ​

Answer 1

${b}^{2} + 8b + 15 = 0$

${b}^{2} + 3b + 5b + 15 = 0$

$b(b + 3) + 5(b + 3) = 0$

$(b + 5)(b + 3) = 0$

b = -5 and b = -3

Answer 2

Answer:

${b}^{2} + 8b \: + 15 \\ {b}^{2} + 5b \: + 3b + 15 \\ b \:( b + 5 )\: 3(b + 5 )\\ b = - 5 \\ b = - 3$