Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### Grade 8 - Mathematics7.44 Problems - VIII

 Example: If a-b = 3 and ab = 10, find the value of a3-b3. Solution: Given that, a-b = 3 Cubing on both sides, we get (a-b)3 = 33 a3-b3-3ab(a-b) = 27 a3-b3-3.10.3 = 27 a3-b3-90 = 27 a3-b3 = 27 + 90 a3-b3 = 117 Directions: Solve the following problems. Also write at least ten examples of your own.
 Q 1: If a-b = 4 and ab = 21, find the value of a3-b3.316318314312 Q 2: If a-b = 6 and ab = 16, find the value of a3-b3.520526528524 Q 3: If a-b = 6 and ab = 91, find the value of a3-b3.1858185418561852 Q 4: If a-b = 3 and ab = 40, find the value of a3-b3.387385381383 Q 5: If a-b = 4 and ab = 45, find the value of a3-b3.602606604608 Q 6: If a-b = 8 and ab = 48, find the value of a3-b3.1668166416621666 Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!

#### Subscription to kwizNET Learning System offers the following benefits:

• Instant scoring of online quizzes
• Progress tracking and award certificates to keep your student motivated
• Unlimited practice with auto-generated 'WIZ MATH' quizzes
• Choice of Math, English, Science, & Social Studies Curriculums
• Excellent value for K-12 and ACT, SAT, & TOEFL Test Preparation
• Get discount offers by sending an email to discounts@kwiznet.com

 Quiz Timer