the equation x^3+3x^2=4 models the volume of a shipping container where x is the width. find the width of box.?
a( 1ft
b( 4ft
c( 8ft
d( 2ft
In this kind of multiple choice question,you could move the four to the left side and make the right side zero,and factor the left side.
But in this case,just substituting in the choices offered is much quicker.
And just by noting that the sum of x^3 and 3x^3 for any number more than one is more than four,you can easily choose which number to test.
But if you want to be formally correct,x^3 + 3x^2 is the formula for volume of a box of sides x and x and height x+3
RC ship –container with camera on board 2
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