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10 December, 02:03

Is 7 + square root of 5 equal to square root of 5 plus a number, what do you know about the number? Why?

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  1. 10 December, 02:50
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    The statement is true. The number is seven. I can find this through the commutative property of addition or plugging in the number and reversing the equation.

    Key: a is 7, b is square root of five, c is solution,? is what we're finding

    Commutative: a + b = b + a

    Plugging and Reversing: a + ? = c, c - a = b
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