B° 1°
delta= b^2-4ac
delta=(2(m-4))^2-4*(m-2)(m-4)(m+2)
=(m-4)[4(m-4)-4(m+2)(m-2)]
=(m-4)(4m-16-4m^2ò8m+16)
=(m-4)(-4m^2+4m)
=(m-4)(-4m)(m-1)
=-4m(m-4)(m-1)
N
B° 1°
delta= b^2-4ac
delta=(2(m-4))^2-4*(m-2)(m-4)(m+2)
=(m-4)[4(m-4)-4(m+2)(m-2)]
=(m-4)(4m-16-4m^2ò8m+16)
=(m-4)(-4m^2+4m)
=(m-4)(-4m)(m-1)
=-4m(m-4)(m-1)