<img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B3%7D%20%20-%204x%20%2B%20%20%5Csqrt%7B%7Bx%7D%5E%7B3%7D%20-%204x%20%2B%209%20%

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3 years ago

7D%20%20%3D%203" id="TexFormula1" title=" {x}^{3} - 4x + \sqrt{{x}^{3} - 4x + 9 } = 3" alt=" {x}^{3} - 4x + \sqrt{{x}^{3} - 4x + 9 } = 3" align="absmiddle" class="latex-formula">
Help me please

Mathematics

1 answer:

eimsori [14]3 years ago

3 0

X= -2,0,2

For this question, you need to isolate all terms under the square root, so you need to move x^3 and -4x to the right. Then you would square both sides, and combine like terms.

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You are on the south side of a river and you need to cross the river in order to get to a campsite. Not

Doss [256]

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Width of river = 0.25 mile

As length of river is not given , but it is given that campsite is located 1 mile east upstream, So length of river = 1 mile

Speed of mine in river while going upstream = 3 miles per hour

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Now Reduced speed of mine = Speed of mine in river while going upstream - Speed of current as going Upstream

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1. There are two ways to reach campsite

(a) either walk 1 mile from starting point in east direction and then swim 0.25 mile in North direction to reach campsite.

(b) From the starting point Considering a right triangle having, base=1 mile and altitude = 0.25 mile, then finding the length of hypotenuse using formula = $\sqrt{(altitude)^2 + (Base)^2$

= $\sqrt{.25^2+1^2}$

=√1.0625

=1.03078(approx)

⇒ you must walk a distance of 1 mile in the east direction and then swim 0.25 mile north direction to reach directly at campsite.[shown in the diagram]