1)x^2+6x+8= 2)m^2-7mn+12n^2= 3)a^2-7ab+10b^2= - вопрос №12682271223271027149394 от osipovalex1969 17.11.2021 20:19

Question

Алгебра: 1)x^2+6x+8= 2)m^2-7mn+12n^2= 3)a^2-7ab+10b^2=

osipovalex1969 · Answer

1)x^2+6x+8

x^2+4x+2x+8

x*(x+4)+2(x+4)

(x+2)*(x-4)

2)m^2-7mn+12n^2

m^2-6mn+9n^2-mn+3n^2

(m-3n)^2-n(m-3n)

(m-3n)*(m-3n-n)

(m-3n)(m-4n)

3)a^2-7ab+10b^2

a²-(2ab+5ab)+10b²

a²-2ab-5ab+10b²

a(a-2b)-5b(a-2b)

(a-2b)(a-5b)