A rectangular box has sides measuring x cm, x + 3 cm and 2x cm. a. Write
Question:
A rectangular box has sides measuring x cm, x + 3 cm and 2x cm.
a. Write down an expression for the volume of the box. Given that the volume of the box is 980 cm3,
b. Show that x3 + 3x2 − 490 = 0.
c. Show that x = 7 is a solution to this equation.
d. Prove that the equation has no other real solutions.
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a To find the expression for the volume of the box we multiply the length width and height of the bo...View the full answer
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Related Book For 
Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS
ISBN: 9781292183398
1st Edition
Authors: Greg Attwood
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