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ℎ . ℎ ​

Answer»

Step-by-step EXPLANATION:

x {}^{2}  + 2x + 1 \\  = x {}^{2}  + x + x + 1 \\  = x(x + 1) + (x + 1) \\  = (x + 1)(x + 1) \\  = (x + 1) { }^{2}



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