prove that 2 minus root 2 upon 2 + root 2 is an irrational number
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2-√2/2+√2
2-√2/2+√2×2-√2/2-√2
=(2-√2)²/(2)²-(√2)²
=(2)²-2(2)(√2)+(√2)²/4-2
=4-4√2+2/2
=2(3-2√2)/2
=3-2√2 <------ it is showing that it's answer will come in fraction that's why it is an irrational number
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