Trial & improvement | x_{2} -4x = 10 |
x_{2} on calculator squared button |
---|---|---|

x | x_{2} -4x |
comment |

5 | 5_{2} -4 x5 =5 |
too small |

6 | 6_{2} -4 x6 =12 |
too large |

5.5 | 5.5_{.2} -4 x5.5 =8.25 |
too small |

5.7 | 5.7_{.2} -4 x5.7 =9.69 |
too small |

5.8 | 5.8_{.2} -4 x5.8 =10.44 |
too large |

5.75 | 5.75_{.2} -4 x5.75 =10.0625 |
too large |

answer = 5.7 | ||

mode set up button | select 3 = table | |

f(x)= | appears | |

press alpha button | ||

press ) button | ||

f(x)=x | appears | |

pressx_{3} button |
||

f(x)=x_{3} |
appears | |

press alpha button | ||

press ) button | ||

f(x)=x_{3} -x |
appears | |

press = button | ||

start | appears | |

insert 4 | ||

press = button | ||

start ends | appears | |

start | ||

insert 0.1 | ||

press = button | ||

table | appears on calculator | |

to re enter and edit table integers
input press ac button once only or it will revert to start of whole process re enter start say at 5.7 re enter say end at 5.8 then 0.01 = table opens again |