2乗の係数でくくると、
-1/5(x^2-300x)-3000
=-1/5｛(x-150)^2-22500｝-3000
=-1/5(x-150)^2+4500-3000
=-1/5(x-150)^2+1500
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2乗の係数でくくると、
-1/5(x^2-300x)-3000
=-1/5｛(x-150)^2-22500｝-3000
=-1/5(x-150)^2+4500-3000
=-1/5(x-150)^2+1500
Users viewing this question
are also looking at these questions 😉
