Solving Quadratic Inequalities: Another Example

[@gomathinaayagam7941]

He looks awesome...😎

[@javiervillegas6587]

At 2:18 why exactly doesn't 2 and 5 work when factoring? 3x5= 15 and 2x1= 2. make the 15 positive and the 2 negative and you get +13x. I'm a little confused on why you couldn't use those numbers to factor, any help would be appreciated

[@photonarrations3062]

I hope I understood your confusion. Please let me know if I didn't. You are probably confused because he didn't explain solving QE by factoring. In the equation a = 3, b = 13, c = 10. Now, you need to find two numbers sum of which is 13 (b value in the equation) and product of which is 30 (a times c). So only 10 and 3 are such numbers. 10+3 = 13 and 10 x 3 = 30. If you want to learn more please search solving quadratic equations by factoring.

[@tansy2279]

Because there’s no negative signs in the inequality. If you have a negative 2 that would mess the whole thing up. Instead of positive 10, you would have negative 10.

[@awesomazingfanboy9878]

Finally, I understood this lesson! Thank you so much! You are really a great and fun teacher! =)

[@kurtlianbragais2127]

what will happen if i cannot factor the equation

[@martakheyfets2235]

Isn’t there some way to tell that the answer is in BETWEEN the two values, without drawing all that?

[@riteshyeddu]

Marta Kheyfets there are 4 formulas

[@riteshyeddu]

If the equation less than zero, x belongs in between the two values,and if the equation is greater than zero, x belongs to all the real numbers except in between the two factors of the quad equation

[@riteshyeddu]

If the equations are less than or equal to, or ,greater than equal to,you should just keep a closed bracket

[@riteshyeddu]

You can get this conclusion by taking the resultant sign of the products of the factored equation,whether it is greater than, less than, greater than equal to or less than equal to zero

[@greenarrow630]

How refreshing... he seems to enjoy what he's teaching

[@vmsrao2125]

very very very good explanation.Thank you

[@feminico2613]

sir, where do you teach? I'm looking for a school with a good teacher, you meet all my standards.

[@kurtlianbragais2127]

he is professor edward bruce burger Edward Bruce Burger (born December 10, 1964)[1][2] is a mathematician and President Emeritus of Southwestern University in Georgetown, Texas.[3][4] Previously, he was the Francis Christopher Oakley Third Century Professor of Mathematics at Williams College, and the Robert Foster Cherry Professor for Great Teaching at Baylor University. He also had been named to a single-year-appointment as vice provost of strategic educational initiatives at Baylor University in February 2011.[5] He currently serves as the president and CEO of St. David's Foundation.[6] Burger has been honored as a leader in education and for his innovative work in developing educational and entertaining mathematics electronic textbooks. He has been a keynote speaker, invited special session speaker, or the conference chair at a number of American Mathematical Society, Mathematical Association of America, and the National Council of Teachers of Mathematics conferences. -WIKIPEDIA

[@sadiaazim7049]

Too good😊

[@veinyyt8966]

Great sir

[@moustafaelawamy3240]

awesome video ..thank you

[@muhammadsadiq1792]

Nice sir.good video

[@EngineerRajneesh_TKS]

beautifully described

[@sediboi]

salute to you sir

[@ComandaKronikk]

I am in hog heaven.