(1) 1/4√256+√0.25 (2) 2√2+3√5-3√2-3√5 (3) √(﹣2/5)²-√1-(﹣4/5)²
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![(1) 1/4√256+√0.25 (2) 2√2+3√5-3√2-3√5 (3) √(﹣2/5)²-√1-(﹣4/5)²](/uploads/image/z/653144-32-4.jpg?t=%281%29+1%2F4%E2%88%9A256%2B%E2%88%9A0.25+%282%29+2%E2%88%9A2%EF%BC%8B3%E2%88%9A5%EF%BC%8D3%E2%88%9A2%EF%BC%8D3%E2%88%9A5+%283%29+%E2%88%9A%28%EF%B9%A32%2F5%29%26%23178%3B%EF%BC%8D%E2%88%9A1%EF%BC%8D%28%EF%B9%A34%2F5%29%26%23178%3B)
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(1) 1/4√256+√0.25 (2) 2√2+3√5-3√2-3√5 (3) √(﹣2/5)²-√1-(﹣4/5)²
(1) 1/4√256+√0.25 (2) 2√2+3√5-3√2-3√5 (3) √(﹣2/5)²-√1-(﹣4/5)²
(1) 1/4√256+√0.25 (2) 2√2+3√5-3√2-3√5 (3) √(﹣2/5)²-√1-(﹣4/5)²
(1) 1/4√256+√0.25
=1/4×16+0.5
=4+0.5
=4.5
(2) 2√2+3√5-3√2-3√5
=(2√2-3√2)+(3√5-3√5)
=-√2
(3) √(﹣2/5)²-√1-(﹣4/5)²
=2/5-√9/25
=2/5-3/5
=-1/5