MorgannJ
26.11.2019 •
Mathematics
V489.8 cm
-
if it costs $3.50 per square foot, what is the approximate total cost of making
pipe that is open at both ends?
30 and 2
Solved
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Ответ:
X times X = X^2
-2 times X = -2X ( add this to 4X to equal 2X)
4 times X = 4X
-2 times 4 = -8
X^2 + 2X -8
To solve when equation = 0
X = +2 or -4