Koj puas tuaj yeem muab lub voos xwmfab hauv paus los ntawm lub hauv paus square?
Koj puas tuaj yeem muab lub voos xwmfab hauv paus los ntawm lub hauv paus square?

Video: Koj puas tuaj yeem muab lub voos xwmfab hauv paus los ntawm lub hauv paus square?

Video: Koj puas tuaj yeem muab lub voos xwmfab hauv paus los ntawm lub hauv paus square?
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Cov Khoom Taw Qhia rau Txoj Cai Fais Fab yog qhov tseem ceeb vim koj ua tau siv nws rau ntau radical qhia. Nco ntsoov tias cov keeb kwm yog tib yam- koj ua tau ua ke cov hauv paus plaub hau nrog cov hauv paus plaub hau , los yog kub roots nrog kub roots , piv txwv. Tab sis koj ua tau 't ntau a square cag thiab a kub root siv txoj cai no.

Hauv qhov no, yuav ua li cas koj muab cov feem ntau nrog cov hauv paus square?

Kauj ruam 1: Ntau tus lej thiab tus denominator los ntawm ib qho radical uas yuav tshem tawm cov radical hauv tus denominator. Yog hais tias lub radical nyob rau hauv lub denominator yog a square cag , ces koj ntau los ntawm a square cag uas yuav ua rau koj zoo meej square nyob rau hauv lub radical thaum multiplied los ntawm tus denominator.

Qhov thib ob, lub hauv paus square ntawm ib squared yog dab tsi? Txhua tus lej tsis tseeb x muaj qhov tshwj xeeb tsis zoo square cag , hu ua tus thawj xib fwb square cag , uas yog denoted los ntawm √x, qhov twg lub cim √ hu ua radical kos npe los yog radix. Piv txwv li, tus thawj xib fwb square cag ntawm 9 yog 3, uas yog denoted los ntawm √9 = 3, vim 32 = 3 ⋅ 3 = 9 thiab 3 yog nonnegative.

Kuj paub yog, koj puas tuaj yeem muab cov hauv paus square nrog tag nrho cov lej?

Koj tuaj yeem muab cov hauv paus square , ib hom radical qhia, ib yam li koj muaj peev xwm muab tag nrho cov lej . Qhov trickiest ib feem ntawm multiplying square cag yog yooj yim kev qhia kom ncav cuag koj cov lus teb kawg, tab sis txawm tias cov kauj ruam no yooj yim yog koj paub koj cov squares zoo meej.

2 x lub sij hawm 2 x yog dab tsi?

Teb thiab piav qhia: 2x ua 2x yog 4x2. Hauv kev nthuav qhia xws li 2x ib , 2 yog hu ua coefficient thiab x yog qhov sib txawv.

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