Cov txheej txheem:
Video: Yuav ua li cas koj daws x 2 equations?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txoj Kev 2 Siv Cov Qauv Quadratic
- Muab tag nrho cov ntsiab lus zoo li no thiab txav mus rau ib sab ntawm qhov kev sib npaug .
- Sau cov quadratic formula .
- Txheeb xyuas qhov tseem ceeb ntawm a, b, thiab c hauv qhov quadraticequation .
- Hloov cov nqi ntawm a, b, thiab c rau hauv kev sib npaug .
- Ua lej.
- Simplify lub hauv paus square.
Ntxiv mus, koj yuav daws li cas rau x hauv ib qho kev sib npaug?
Rau daws x thaum lub kev sib npaug suav nrog tus exponent, pib los ntawm kev cais lub sij hawm nrog tus exponent. Tom qab ntawd, cais qhov sib txawv nrog tus exponent los ntawm kev faib ob sab los ntawm coefficient ntawm tus x lub sij hawm kom tau koj cov lus teb. Yog tias kev sib npaug muaj fractions, pib los ntawm cross-multiplying thefractions.
Qhov thib ob, cov kev daws teeb meem rau qhov sib npaug yog dab tsi? Ib kev sib npaug yog ib qho kev qhia txog algebraic uas feem ntau hais txog qhov tsis paub hloov pauv mus rau lwm qhov sib txawv lossis qhov tsis sib xws. Piv txwv li, x + 2 = 15 yog ib kev sib npaug , as ib2 = 4. Nws daws , or root, ib kev sib npaug yog tej yam muaj nqis los yog txheej txheem uas muaj peev xwm besubstituted rau hauv kev sib npaug los ua kom muaj tseeb.
Tsis tas li ntawd, koj yuav daws li cas rau x nyob rau hauv ib qho kev sib npaug quadratic?
daws x : 2 x 2 + 3 x + 2 = 0. Vim tias a ≠ 1, muab faib los ntawm tus kev sib npaug los ntawm. Tsis muaj kev daws teeb meem hauv cov lej tiag tiag. Nws yuav txaus siab rau koj kom paub tias ua tiav cov txheej txheem square rau kev daws teeb meem sib npaug tau siv rau ntawm kev sib npaug ax2 + bx + c = 0 to derive the plaub fab qauv.
Koj yuav daws li cas rau x thiab y cuam tshuam?
Yuav nrhiav tau x - cuam tshuam ntawm ib tug muab linear kev sib npaug , ntsaws rau 0 rau ' y ' thiab daws 'x '. Nrhiav tus y - cuam tshuam , ntsaws 0 rau ' x ' thiab daws rau ' y '. Nyob rau hauv no nyeem, koj yuav pom yuav ua li cas mus nrhiav tus x - cuam tshuam thiab cov y - cuam tshuam rau ib tug muab linear kev sib npaug . Tshawb xyuas!
Pom zoo:
Koj yuav daws qhov kev sib npaug plaub npaug li cas siv txoj cai null factor?
Los ntawm qhov no peb tuaj yeem suav 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 hu ua Null Factor Law; thiab peb siv nws ntau zaus los daws qhov sib npaug ntawm plaub fab
Yuav ua li cas koj daws qhov zoo tagnrho gas txoj cai?
Txoj Cai Kev Cai Roj Hmab Zoo Tshaj Plaws Cov Lus Nug Gas Txoj Cai Cov Lus Nug: Teb: Qhov Volume yog V = 890.0mL thiab qhov kub yog T = 21 ° C thiab qhov siab yog P = 750mmHg. PV = nRT. Teb: Tus naj npawb ntawm moles yog n = 3.00moles, kub yog T = 24 ° C thiab siab yog P = 762.4 mmHg. PV = nRT
Yuav ua li cas koj ua system ntawm equations lo lus teeb meem?
Txhawm rau daws qhov teeb meem ntawm lo lus sib npaug, peb ua ntej txhais qhov sib txawv thiab tom qab ntawd rho tawm cov kab zauv los ntawm lo lus teeb meem. Tom qab ntawd peb tuaj yeem daws qhov system siv cov duab kos, tshem tawm, lossis hloov txoj hauv kev
Koj yuav daws tau qhov system ntawm linear equations graphically li cas?
Txhawm rau daws qhov system ntawm kab zauv sib npaug graphically peb teeb tsa ob qho tib si sib npaug hauv tib qhov kev sib koom ua ke. Kev daws rau qhov system yuav nyob rau hauv qhov chaw uas ob kab sib tshuam. Ob kab sib tshuam hauv (-3, -4) uas yog kev daws rau qhov kev sib npaug no
Koj yuav daws tau qhov system ntawm linear equations algebraically li cas?
Siv kev tshem tawm los daws cov kev daws teeb meem hauv ob qhov sib npaug: x + 3y = 4 thiab 2x + 5y = 5. x = −5, y = 3. Muab txhua lo lus hauv thawj kab zauv los ntawm –2 (koj tau txais –2x – 6y = –8) thiab tom qab ntawd ntxiv cov ntsiab lus hauv ob qhov sib npaug ua ke. Tam sim no daws -y = -3 rau y, thiab koj tau y = 3