2 years ago

Cho Q(x)=x^2+mx-12.Biết Q(-3)=0.tìm nghiệm còn lại

Mathematics

1 answer:

Pachacha [2.7K]2 years ago

3 0

Answer: m=-1.

Step-by-step explanation:

$Q(x)=x^2+mx-12\ \ \ \ Q(-3)=0\ \ \ \ \ m=?\\Q(-3)=(-3)^2+m*(-3)-12=0\\9-3m-12=0\\-3m-3=0\\3m=-3\ |:3\\m=-1.$

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