find the solution set. (x+10)(x+10)=0

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(x + 10)(x + 10) = 0

when two numbers multiply to give zero, one of them must be zero

Hence either (x + 10 ) = 0 or (x + 10 ) = 0

So If x + 10 = 0,

x = -10

Notice that the other answer from the second number is the same , but we write numbers in sets only once, we don't repeat

Solution set = {-10}

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