Casio fx 115 ES Plus Solving Quadratic Equations

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Casio fx 115 ES Plus Solving Quadratic Equations

blackpenredpen · ⏱ 2:57 · 22.4K مشاهدة · 13 years ago

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so similar to the previous video in this case we are going to do some quadratic equations and we must have the quadratic equation in the standard form ax² + plus is equal to Zer so just like these two again we're going to use calculator so turn on the calculator and the best place to go is the mode and we are trying to do something with the equation so that's number five and look at we have x² and no is equal to number right the standard form of the quadratic equation that's option number three so press three it's going to ask you what's the value of and and that's exactly the coefficient of squ and the coefficient of and the number that has no okay so it's in the standard form so let me write this down since we have squ so right here technically you have 1 x² so we have is equal to 1 and the number in front of the just an right here it's 8 so that's the value for is8 is number that has no so is equal to 12 positive 12 so we just need to enter these numbers in this order have one equal the second one have a88 equal third one of 12 equal so enter all this then press another equal sign and get X1 that's the first answer that's the first answer which is six so can say is equal to 6 or we have the second answer as well press down x2 that's the second answer so that means can be either six or equal to two right both answer will work two and six are both Solutions of this equation try another one so notice that just press the AR key and then press the all clear we can clear all that so for this one the is six the number in front of the square is just six equal the number in front of the it's -7 so -7 equal the number right here is -4 then we also get fractions X1 is equal to over3 so can be over 3 or another one second answer can also be -3 over2 this is how you do it this is how you do the quadratic equations on this calculator very straightforward very easy right