Question

$x {}^{2} - x {}^{2} = {?} \\ x {}^{2} + x {}^{2} = {?}$
pls tell me right answer , I was confused with it
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Answer 1

Answer:

${x}^{2} - {x}^{2} = 0 \\ \\ \\ {x}^{2} + {x}^{2} = 2 {x}^{2}$