Video: Koj yuav daws qhov kev sib npaug plaub npaug li cas siv txoj cai null factor?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Los ntawm qhov no peb tuaj yeem suav tau tias:
Yog tias qhov khoom ntawm ob tus lej yog xoom, ces ib lossis ob tus lej yog xoom. Ntawd yog, yog tias ab = 0, ces a = 0 lossis b = 0 (uas suav nrog qhov ua tau tias a = b = 0). Qhov no yog hu ua Null Factor Law ; thiab peb siv nws feem ntau mus daws quadratic equations.
Ib yam li ntawd, nws raug nug, dab tsi yog 4 txoj hauv kev los daws qhov sib npaug plaub npaug?
Plaub cov txheej txheem ntawm kev daws ib qho kev sib npaug quadratic yog factoring, siv cov hauv paus square, ua kom tiav cov square thiab cov plaub fab qauv. Yog li qhov kuv xav tham txog tam sim no yog ib qho kev nthuav dav ntawm txhua qhov sib txawv txoj kev ntawm kev daws ib qho kev sib npaug quadratic.
Tsis tas li ntawd, txhais li cas los ntawm kev ua kom tiav lub square? Ua kom tiav Square yog ib txoj hauv kev siv los daws qhov sib npaug plaub npaug los ntawm kev hloov daim ntawv sib npaug kom sab laug yog qhov zoo meej square trinomial. daws ax2+bx+c=0 by ua kom tiav lub square : 1. Hloov qhov sib npaug kom lub sij hawm tas li, c, nyob ib leeg ntawm sab xis.
Tsis tas li ntawd, dab tsi yog qhov null factor?
Cov Null Factor Txoj Cai Yog tias cov khoom ntawm ob tus lej yog xoom, ces ib lossis ob tus lej yog xoom. Ntawd yog, yog tias ab = 0, ces a = 0 lossis b = 0 (uas suav nrog qhov ua tau tias a = b = 0). Qhov no yog hu ua Null Factor Txoj Cai; thiab peb siv nws ntau zaus los daws qhov sib npaug ntawm plaub fab.
Dab tsi yog quadratic equation hauv lej?
A quadratic equation yog ib kev sib npaug ntawm qhov thib ob degree, txhais tau tias nws muaj tsawg kawg yog ib lub sij hawm uas yog squared. Cov qauv qauv yog ax² + bx + c = 0 nrog a, b, thiab c ua qhov tsis tu ncua, lossis cov lej coefficients, thiab x yog qhov tsis paub sib txawv.
Pom zoo:
Yuav daws qhov tsis sib npaug ntawm cov kab sib npaug thiab cov kab sib npaug sib npaug li cas?
Kev daws qhov tsis sib npaug ntawm qhov sib npaug yog zoo ib yam li kev daws cov kab sib npaug. Qhov sib txawv tseem ceeb yog koj tig lub cim tsis sib xws thaum faib lossis muab faib los ntawm tus lej tsis zoo. Graphing linear inequalities muaj ob peb qhov sib txawv ntxiv. Qhov uas yog qhov ntxoov ntxoo muaj xws li qhov tseem ceeb uas qhov kev tsis sib xws ntawm cov kab tawm muaj tseeb
Puas yog nws ua tau rau ib qho kev sib npaug ntawm ob txoj kab sib npaug kom tsis muaj kev daws teeb meem piav qhia koj qhov laj thawj?
Cov kab ke ntawm kab sib npaug tuaj yeem tsuas muaj 0, 1, lossis ib qho kev daws teeb meem tsis kawg. Ob kab no tsis tuaj yeem hla ob zaug. Cov lus teb raug yog tias qhov system muaj ib qho kev daws teeb meem. Total Number of Points Number of 2-Point Baskets Number of 3-Point Baskets 17 4 (8 ntsiab lus) 3 (9 points) 17 1 (2 points) 5 (15 points)
Koj yuav daws qhov sib npaug li cas los ntawm kev cais qhov sib txawv?
Cov txheej txheem yooj yim los cais qhov sib txawv yog "ua ib yam dab tsi rau ob tog" ntawm qhov sib npaug, xws li ntxiv, rho tawm, sib npaug, lossis faib ob sab ntawm qhov sib npaug los ntawm tib tus lej. Los ntawm kev rov ua cov txheej txheem no, peb tuaj yeem tau txais qhov sib txawv ntawm ib sab ntawm qhov sib npaug
Dab tsi yog qhov sib txawv ntawm cov kab lus sib npaug thiab qhov sib npaug sib npaug?
Cov kab lus sib npaug muaj qhov muaj txiaj ntsig zoo ib yam tab sis tau nthuav tawm nyob rau hauv ib hom ntawv sib txawv uas siv cov khoom ntawm cov lej xws li ax + bx = (a + b) x yog cov kab lus sib npaug. nruj me ntsis, lawv tsis yog 'sib npaug', yog li peb yuav tsum siv 3 kab sib luag hauv 'sib npaug' es tsis yog 2 raws li qhia ntawm no
Koj yuav daws qhov kev sib npaug lossis qhov tsis sib xws li cas?
Txhawm rau daws qhov tsis sib xws siv cov kauj ruam hauv qab no: Kauj Ruam 1 Tshem tawm cov feem ntau los ntawm kev muab tag nrho cov ntsiab lus los ntawm tus lej qis tshaj ntawm txhua feem. Kauj Ruam 2 Ua kom yooj yim los ntawm kev sib txuas zoo li cov ntsiab lus ntawm txhua sab ntawm qhov tsis sib xws. Kauj Ruam 3 Ntxiv lossis rho tawm kom tau txais qhov tsis paub ntawm ib sab thiab tus lej ntawm lwm qhov