Quadratic Formula w calculator Casio fx 115 es plus

would like to show you how to use this calculator, my favorite scientific calculator, to check the answer for us of the question that we just did. Okay? So, this calculator, it's Casio FX-115ES, the plus version of it. So, it has lot of features. Like think like the best scientific calculator so far. And it's really cool. will show you. So, turn this on. We are doing We are doing this, right? 2x² + 9x - 5. If you turn on the calculator, this is place where you can just do the regular calculations, like 8 * 7, things like that. Right? The best part that you should go is go to the mode. And that will have different features. This is where you can find all the good stuff. Go to mode. And notice that number five, it has EQN, equations. EQN stands for equations. And that's the one that we're going to going. This calculator has few equation solver building for us. So, let's see what we have. Number five. And notice that we have four options. And the third option is ax² + bx + = 0. And this is exactly what we have right here. So, of course, that's the one that we're going to choose. So, go to go to three. So, right here, it asks you that is equal to what, is equal to what, and is equal to what. And we have already determined that is equal to two. So, we just need to put two in and then hit equal. is equal to nine. So, hit nine right there and hit equal. And we just need to fill in what's the value of is -5. So, I'll put this for the negative sign, negative, and then five. Equals. Okay? And once we have entered all this, we're telling the the calculator that we are trying to solve this equation, 2x^2 + 9x - 5 is equal to zero. Okay? And then we just need to hit equal. And as you can see that it shows us X1, the first solution is equal to 1/2. And think that's exactly what we got earlier as well. All right. The first solution is is equal to 1/2. And notice that this calculator gives you fraction answer. If you don't want fraction, you can also hit to to get decimals. Okay? But the first answer is 1/2. We got it. The next answer, let's see. To get the next answer, you can just press equal sign. And you see that X2, the second answer, is -5. If you want to go back, you can just press up. You can also press down. 1/2 for the first answer, and the second answer is -5, which we got it. So that way we know we are doing this correctly. And this is extremely helpful when you are doing when you are taking test, right? When you are taking test, because you don't want to make any mistakes, especially on test. And this is wonderful This is wonderful way to help you check the answer. To check the answer, not to do the answer, not to do the question for you though. You still have to show the all the steps, right? You still have to write down the quadratic formula. You still have to do all the steps. This is how you check answers. Okay? But before you go, let me show you this. Because if you just want to clear this, if you just press clear, we press press on to clear or you or if you press AC to clear, you are still in here. You are still in the equation solver here. What you need to do is go back to mode, go to number one for regular computation. So, hit one. And then you can go back to the regular computation steps. Again, let's say the one showed you, 8 * 7 is equal to 56.