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New exercises from Khan Academy 2020-08-07T05:32:39.000000
Aggiornato: 6 min 18 sec fa

### Quadratics by taking square roots (intro)

Lun, 2020-06-01 19:15
Solve simple quadratic equations by taking the square root of both sides of the equation.

Lun, 2020-06-01 19:12
Solve quadratic equations of the form ax^2+bx+c=0 that can be rewritten according to their linear factors.

Lun, 2020-06-01 19:07
Solve quadratic equations of the form x^2+bx+c=0 that can be rewritten according to their linear factors.

### Quadratics by taking square roots

Lun, 2020-06-01 19:04
Solve quadratic equations of the form (x+a)²-b=0. These can be solved using square roots. For example, solve (x-5)²-4=0.

### Zero product property

Lun, 2020-06-01 18:21
Use the zero product property to solve quadratic equations. For example, solve (x-5)(x+2)=0.

### Convert units multi-step word problems (US customary)

Lun, 2020-06-01 14:12
Solve word problems that involve converting between US customary measures of distance, volume, and mass.

### Impact of crowdsourcing innovations

Lun, 2020-06-01 13:27
Check your understanding of the benefits and risks of crowdsourcing innovations in this set of free practice questions designed for AP Computer Science Principles students.

### Impact of collaboration innovations

Lun, 2020-06-01 13:20
Check your understanding of the benefits and risks of collaboration innovations in this set of free practice questions designed for AP Computer Science Principles students.

### Impact of communication innovations

Lun, 2020-06-01 03:33
Check your understanding of the risks of email and social media in this set of free practice questions designed for AP Computer Science Principles students.

### User authentication methods

Dom, 2020-05-31 21:43
Check your understanding of strong passwords and multi-factor authentication in this set of free practice questions designed for AP Computer Science Principles students.

### Digital certificates

Dom, 2020-05-31 21:40
Check your understanding of digital certificates and certificate authorities in this set of free practice questions designed for AP Computer Science Principles students.

### Data encryption techniques

Dom, 2020-05-31 21:36
Check your understanding of data encryption techniques (symmetric encryption and public key encryption) in this set of free practice questions designed for AP Computer Science Principles students.

### Computer malware

Dom, 2020-05-31 21:33
Check your understanding of computer malware, computer viruses, and keylogging in this set of free practice questions designed for AP Computer Science Principles students.

### Rogue access points

Dom, 2020-05-31 21:29
Check your understanding of how rogue access points can intercept data in this set of free practice questions designed for AP Computer Science Principles students.

### Phishing attacks

Dom, 2020-05-31 21:28
Check your understanding of phishing attacks in this set of free practice questions designed for AP Computer Science Principles students.

### Geolocation

Dom, 2020-05-31 21:23
Check your understanding of how a user's geolocation can be tracked in this set of free practice questions designed for AP Computer Science Principles students.

### User history

Dom, 2020-05-31 21:21
Check your understanding of how cookies, browsing history, and search history can be used to track users in this set of free practice questions designed for AP Computer Science Principles students.

### PII (Personally identifiable information)

Dom, 2020-05-31 21:16
Check your understanding of PII (personally identifiable information) in this set of free practice questions designed for AP Computer Science Principles students.

### Representations of solutions

Ven, 2020-05-29 23:15
Practice identifying and interpreting particulate models of solutions in this set of free questions designed for AP Chemistry students.

### Structure of metals and alloys

Ven, 2020-05-29 19:26
Practice identifying and interpreting particulate models of alloys in this set of free questions designed for AP Chemistry students.