Use the trial and improvement method to solve the equation 2xcubed+5=24. Find a solution that is a positive number give your answer correct to one decimal place.
ease help and show working out, thank you!
1 Answer |
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Hi Kath;
2x3+5=24
Let's subtract 5 from both sides...
-5+2x3+5=24-5
2x3=19
Let's divide both sides by 2...
(2x3)/2=19/2
x3=9.5
x | x3 | result
1 | 1 |too small
2 | 8 |very close
2.1| 9.3|closest
2.2|10.6|too high
x=2.1