Question

Разложите на множители 3) m^2-7mn+12n^24)a^2-7ab+10b^2

Answer 1

3)
m2 + -7mn + 12n2 = 0
 -7mn + m2 + 12n2 = 0
-7mn + m2 + 12n2 = 0
(m + -4n)(m + -3n) = 0

4) 
a^2 - 5ab - 2ab + 10b^2 =
a(a - 5b) - 2b(a - 5b) =
(a - 5b)(a - 2b)