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根号化简计算(1)√0.64*5√9/25÷1/4√25(2)(√48-4√1/8)-(3√1/3-2√0.5)(3)(

来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/11 08:57:27
根号化简计算
(1)√0.64*5√9/25÷1/4√25
(2)(√48-4√1/8)-(3√1/3-2√0.5)
(3)(5√48+√12-6√7)÷√3
(4)√1.9平方-1.1平方*√1.6平方-1.4平方
根号化简计算(1)√0.64*5√9/25÷1/4√25(2)(√48-4√1/8)-(3√1/3-2√0.5)(3)(
(1)√0.64*5√9/25÷1/4√25
=0.8*5*(3/5)÷(5/4)
=4*(3/5)*(4/5)
=48/25
(2)(√48-4√1/8)-(3√1/3-2√0.5)
=4√3-√2-√3+√2
=3√3
(3)(5√48+√12-6√7)÷√3
=5√16+√4-2√21
=20+2-2√21
=22-2√21
(4)√1.9平方-1.1平方*√1.6平方-1.4平方
=√[(1.9+1.1)(1.9-1.1)]*√[(1.6+1.4)(1.6-1.4)]
=√(3*0.8)*√(3*0.2)
=√(3²*0.16)
=3*0.4
=1.2