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a²+3a-5=0
usando Ec. general para encontrar el valor de a:
a12=(-b±√(b²-4a'c))/2a'
a12=(-3±√(3²-4(-5)))/2
a12=(-3±√(9+20))/2=(-3±√29)/2
a1=(-3+5.385)/2=1.192
a2=(-3-5.385)/2=-4.192
usando a1
M=1.192(1.192+1)(1.192+2)(1.192+3)
M=1.192*2.192*3.192*4.192
M=34.96≈35
usando a2
M=-4.192(-4.192+1)(-4.192+2)(-4.192+3)
M=-4.192(-3.192)(-2.192)(-1.192)
M=34.96≈35
espero haberte ayudado