Question

упростить выражение 3m(m-4)-(m+2)^2

Answer 1

3m^2-12m-m^2-4m+4
2m^2-16m+4

Answer 2

3m^2-12m-m^2+4m+4
2m^2-8m+4=0 |:2
m^2-4m+2=0
D=16-4*2=8
m1=4+2√2/2=4+√2
m2=4-2√2/2=4-√2