josued123321
01.02.2020 •
Mathematics
The long side of a rectangle is 3x+21 units, and it's area is 3x^2+33x+84. find the width
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Ответ:
(3x+21)*w=3x^2+33x+84
w=(3x^2+33x+84)/3x+21
(3(x+4)(x+7))/3(x+7)
w=x+4
Ответ: