计算:(1)2+根号3)(2-根号3) (2)(根号2+1)² (3)(2根号3-根号2)² 急!!!!!
(4)根号40÷根号5-根号10×2根号5(5)(根号5-1)²-(根号5+1)²(6)(-2根号12)²÷(根号75+3根号1/3-根号4...
(4)根号40÷根号5-根号10×2根号5 (5)(根号5-1)²-(根号5+1)² (6)(-2根号12)²÷(根号75+3根号1/3-根号48) (7)根号147-根号54÷2+(3-根号3)(1+1/3) (8)(根号3-根号2)²×(5+2根号6) (9)1/2(2+根号3)-3/4(根号2+根号27)
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(1)2+根号3)(2-根号3)
=4-3
=1
(2)(根号2+1)²
=2+2√2+1
=3+2√2
(3)(2根号3-根号2)²
=12-4√6+2
=14-4√6
(4)根号40÷根号5-根号10×2根号5
=√8-10√2
=2√2-10√2
=-8√2
(5)(根号5-1)²-(根号5+1)²
=(√5-1+√5+1)(√5-1-√5-1)
=2√5*-2
=-4√5
(6)(-2根号12)²÷(根号75+3根号1/3-根号48)
=48÷(5√3+√3-4√3)
=48÷2√3
=24÷2√3
=8√3
(7)根号147-根号54÷2+(3-根号3)(1+1/3)
=7√3-3√3+4-4/3√3
=8/3√3+4
(8)(根号3-根号2)²×(5+2根号6)
=(3-2√6+2)x(5+2√6)
=25-24
=1
(9)1/2(2+根号3)-3/4(根号2+根号27)
=1+1/2√3-3/4√2-9/4√3
=1-3/4√2-7/4√3
如果本题有什么不明白可以追问,如果满意请点击“选为满意答案”
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步!
(1)2+根号3)(2-根号3)
=4-3
=1
(2)(根号2+1)²
=2+2√2+1
=3+2√2
(3)(2根号3-根号2)²
=12-4√6+2
=14-4√6
(4)根号40÷根号5-根号10×2根号5
=√8-10√2
=2√2-10√2
=-8√2
(5)(根号5-1)²-(根号5+1)²
=(√5-1+√5+1)(√5-1-√5-1)
=2√5*-2
=-4√5
(6)(-2根号12)²÷(根号75+3根号1/3-根号48)
=48÷(5√3+√3-4√3)
=48÷2√3
=24÷2√3
=8√3
(7)根号147-根号54÷2+(3-根号3)(1+1/3)
=7√3-3√3+4-4/3√3
=8/3√3+4
(8)(根号3-根号2)²×(5+2根号6)
=(3-2√6+2)x(5+2√6)
=25-24
=1
(9)1/2(2+根号3)-3/4(根号2+根号27)
=1+1/2√3-3/4√2-9/4√3
=1-3/4√2-7/4√3
如果本题有什么不明白可以追问,如果满意请点击“选为满意答案”
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步!
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