kwizNET Subscribers, please login to turn off the Ads!
Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
4.23 Finding the Factors of a Trinomial That is a Perfect Square - II

Example: Factorise 9x2-24x+16.
Solution: Given that 9x2-24x+16,
= (3x)2 - 24x + 42
= (3x)2 - 2.3x.4 + 42
This is the form of a2 - 2ab + b2.
=(3x-4)2
= (3x-4)(3x-4)
\Factors of the given trinomials are (3x-4)(3x-4).
Directions: Find the factors of given trinomials. and show your work. Also write at least ten examples of your own.
Q 1: Factorise x2 - 18x + 81.
(x-9)(x-9)
(x+9)(x-9)
(x+9)(x+9)

Q 2: Factorise 81x2 - 18x + 1.
(9x+1)(9x-1)
(9x-1)(9x-1)
(9x+1)(9x+1)

Q 3: Factorise 25x2 - 40x + 16.
(5x+4)(5x-4)
(5x+4)(5x+4)
(5x-4)(5x-4)

Q 4: Factorise 81x2 - 90x + 25.
(9x+5)(9x-5)
(9x-5)(9x-5)
(9x+5)(9x+5)

Q 5: Factorise 36x2 - 24x + 4.
(6x-2)(6x+2)
(6x+2)(6x+2)
(6x-2)(6x-2)

Q 6: Factorise x2 - 2x + 1.
(x+1)(x-1)
(x+1)(x+1)
(x-1)(x-1)

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:

  • Unrestricted access to grade appropriate lessons, quizzes, & printable worksheets
  • Instant scoring of online quizzes
  • Progress tracking and award certificates to keep your student motivated
  • Unlimited practice with auto-generated 'WIZ MATH' quizzes
  • Child-friendly website with no advertisements
  • 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