Tus qauv B24ac yog dab tsi?
Tus qauv B24ac yog dab tsi?

Video: Tus qauv B24ac yog dab tsi?

Video: Tus qauv B24ac yog dab tsi?
Video: ET Yaj - Yog Hmoov Dab Tsi 2024, Kaum ib hlis
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Qhov kev ntxub ntxaug yog kev qhia b2 - 4ac ib , uas yog txhais rau ib lub quadratic kev sib npaug ax 2 + bx + c = 0. Raws li qhov kos npe ntawm cov lus qhia, koj tuaj yeem txiav txim siab pes tsawg tus lej tiag tiag cov kev daws teeb meem kev sib npaug muaj. Yog tias koj tau txais tus lej zoo, lub quadratic yuav muaj ob qhov kev daws teeb meem tshwj xeeb.

Hauv qhov no, tus qauv B yog dab tsi?

Tab sis qee zaus lub quadratic yog qhov nyuaj dhau, lossis nws tsis cuam tshuam tag nrho, lossis koj tsis xav tias zoo li factoring. Lub Quadratic Formula siv cov "a", " b ", thiab "c" los ntawm "ax2 + bx + c", qhov "a", " b ", thiab "c" yog cov lej xwb; lawv yog "tus lej coefficients" ntawm lub quadratic kev sib npaug lawv twb muab rau koj daws.

Ib tug kuj yuav nug, vim li cas tus neeg ntxub ntxaug txiav txim seb muaj pes tsawg txoj kev daws teeb meem? Cov neeg ntxub ntxaug tuaj yeem yog qhov zoo, xoom, lossis tsis zoo, thiab qhov no txiav txim siab muaj pes tsawg txoj kev daws teeb meem muaj rau qhov muab quadratic equation. Ib tug zoo neeg ntxub ntxaug qhia tias lub quadratic muaj ob qhov sib txawv tiag tiag tus lej daws teeb meem . A neeg ntxub ntxaug ntawm xoom qhia tias lub quadratic muaj qhov rov ua dua tooj daws.

Ib yam li ntawd, koj tuaj yeem nug, B 2 4ac qhia koj li cas?

Qhov kev ntxub ntxaug yog kev qhia b2 - 4ac ib , uas yog txhais rau ib qho quadratic equation ax 2 + bx + c = 0. Raws li cov cim qhia, koj tuaj yeem txiav txim siab seb pes tsawg tus lej tiag tiag qhov kev sib npaug plaub npaug muaj. Yog koj tau 0, lub quadratic yuav muaj raws nraim ib qho kev daws, ob lub hauv paus.

B2 4ac 0 muaj pes tsawg txoj kev daws teeb meem?

Yog b2 - 4ac yog qhov zoo (> 0) ces peb muaj 2 txoj kev daws teeb meem. Yog b2 - 4ac yog 0 ces peb tsuas muaj ib xal raws li cov qauv raug txo rau x = [-b ± 0]/2a. Yog li x = -b/2a, muab nkaus xwb ib xal . Thaum kawg, yog b2 - 4ac tsawg dua 0 peb tsis muaj kev daws teeb meem.

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