Question

根号下1.25方-0.8方等于多少

Answer 1

√(1.25²-0.8²)=√[(1.25+0.8)(1.25-0.8)]=√(2.05×0.45)=√0.9225=15√0.0041

=(15/100)√41=0.15(√41)=0.960468635.