Calculus

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5-3ã2 multiplied by its conjugate is...

Its supposed to be 7, but I don't get how to do this, cause now im totally confused, i thought that the conjugate came when you were to rationalize a denominator...

I did this...

15ã2-9ã4
15ã2-18

  • Calculus -

    Well, if you figure that 5^2 = 25, not 15, you'll be on your way

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