Question

Разложите на множители

в) 42-13b+b^2
г) 48-14c+c^2

Answer 1

$42-13b+b^2=42-7b-6b+b^2=7(6-b)-b(6-b)=(6-b)(7-b)\\48-14c+c^2=48-8c-6c+c^2=8(6-c)-c(6-c)=(6-c)(8-c)$