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So this is going to be, P is going to be equal But it's going to work out for us because we are taking the Have put a negative there, which would have implied a negative here and a negative there. Here and a negative here, it's still not going to change the value. Minus, the square root of, instead of writing 0.81, I could write that as 0.9 squared.
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We could write that P is equal to the plus or In fact we could writeĠ.81 as 0.9 squared.
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So I'm gonna have two numbers to the right of 0.9 squared, well that's going to be 0.9 times 0.9, which is going to be equal to? Well nine times nine is 81,Īnd I have one, two, numbers to the right of the decimal, Take, instead of nine squared, what happens if I take 0.9 squared? Let me try that out. The decimal times itself, I'm gonna have something with two digits to the right of the decimal. Multiply something that has one digit to the right of To the right of the decimal and so if I were to Saying the same truth about the universe, but what about 0.81? Well 0.81 has two digits behind, Squared is equal to 81, or we could write that nine is equal to the principal root of 81. Squared is equal to 81, I kinda know what's going on. Immediately say, well okay, you know if this was P But still, what could P be? In your brain, you might So we could write that P is equal to the plus or minus square root of 0.81, which kind of helps us, it's another way of expressing the same, Or negative, because if you square it, if you squareĮven a negative number, you're still going to
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The square root symbol here, that means the principal root, or just the positive square root. To the positive or negative square root of 0.81. This is, that well, that means that P is going to be equal So how could we think about this? Well one thing we couldĭo is we could say, look if P squared is equal to 0.81, another way of expressing Let's see if we can solve the equation P squared is equal to 0.81.
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