Video: Dab tsi yog qhov sib txawv ntawm cov kab lus sib npaug thiab qhov sib npaug sib npaug?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
cov lus sib npaug muaj tus nqi tib yam tab sis nthuav tawm nyob rau hauv ib qho txawv hom ntawv siv cov khoom ntawm cov lej xws li ax + bx = (a + b)x yog cov lus sib npaug . nruj me ntsis, lawv tsis "sib npaug", yog li peb yuav tsum siv 3 kab sib luag hauv "sib npaug" es tsis yog 2 raws li qhia ntawm no.
Ib yam li ntawd, dab tsi yog qhov sib npaug?
Sib npaug yog cov lus qhia uas yog tib yam, txawm tias lawv yuav saib txawv me ntsis. Yog tias koj ntsaws rau tib tus nqi sib txawv rau hauv cov lus sib npaug , lawv txhua tus yuav muab tib tus nqi rau koj thaum koj ua kom yooj yim.
Kuj Paub, ob txoj hauv kev los sau cov kab zauv sib npaug li cas? Lwm cov lus teb 3(x + 3) thiab 3x + 9 yog cov lus sib npaug , vim tus nqi ntawm ob leeg tus cov lus qhia tseem zoo ib yam rau txhua tus nqi ntawm x. Cov cov lus qhia 6 (x 2 + y + 2) thiab 6x2 6y+12 yog cov lus sib npaug thiab tuaj yeem sau ua 6(x2 y + 2) = 6x2 + 6y + 12.
Yog li ntawd, dab tsi yog qhov piv txwv ntawm ib qho kev qhia sib npaug?
Piv txwv ntawm Hais lus sib npaug 3 x + 2 thiab 3 x + 6 yog cov lus sib npaug , vim tus nqi ntawm ob lub cov lus qhia tseem zoo ib yam rau txhua tus nqi ntawm x. Piv txwv li, x = 4, 3x + 2 = 34 + 2 = 18 thiab. 3x + 6 = 3 x 4 + 6 = 18.
Coefficients yog dab tsi?
Hauv lej, a coefficient yog ib qho kev sib txuam hauv qee lub sij hawm ntawm polynomial, series, lossis ib qho kev qhia; nws feem ntau yog tus lej, tab sis tej zaum yuav yog ib qho kev qhia. Piv txwv li, yog tias y raug suav tias yog ib qho parameter hauv cov lus hais saum toj no, qhov coefficient ntawm x yog −3y, thiab qhov tsis tu ncua coefficient yog 1.5 + y.
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