what number should be added to 8 square + 6x to get X + 3 the whole square
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? +8^2+6x=( x + 3)^2. or ? = ( x+3)^2 minus 8 square + 6 x.
that's why,
x^2-6x-55 is the answer
that's why,
x^2-6x-55 is the answer
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