How to prove that a square plus b square is greater than or equal to 2Ab In addition, recently, the study of symbols is a bit mixed. When we do questions according to the formula of two numbers and square, do we want to convert the symbols into the same as the formula? For example, the square of [- M-N] should be changed into {[- M] - N} | Math enthusiast | Mathematical art

How to prove that a square plus b square is greater than or equal to 2Ab In addition, recently, the study of symbols is a bit mixed. When we do questions according to the formula of two numbers and square, do we want to convert the symbols into the same as the formula? For example, the square of [- M-N] should be changed into {[- M] - N}

Because (a-b) ^ 2 > = 0, that is, a ^ 2 + B ^ 2-2ab > = 0, the term is transferred to a ^ 2 + B ^ 2 > = 2Ab (- m-n) ^ 2 = (M + n) ^ 2

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