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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
4.22 Find The Factors of Difference of Two Squares - I

The difference two squares is always equal to the product of the sum and difference of the square roots of the square terms in the expression.

Example: Factorise 16x2-1.
Solution: Given that 16x2-1
= (4x)2 - (1)2
This is the for of a2-b2.
= (4x+1)(4x-1)
\ Factors of 16x2-1 is (4x+1)(4x-1)


Directions: Find the factors of given terms and show your work. Also write at least ten examples of your own.
Q 1: Factorise 4x2 - 1.
(2x-1)(2x-1)
(2x+1)(2x+1)
(2x+1)(2x-1)

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

Q 3: Factorise 144x2 - 1.
(12x+1)(12x-1)
(12x-1)(12x-1)
(12x+1)(12x+1)

Q 4: Factorise 169x2 - 1.
(13x+1)(13x+1)
(13x+1)(13x-1)
(13x-1)(13x-1)

Q 5: Factorise 225x2 - 1.
(15x-1)(15x-1)
(15x+1)(15x+1)
(15x+1)(15x-1)

Q 6: Factorise 9x2 - 1.
(3x+1)(3x+1)
(3x-1)(3x-1)
(3x+1)(3x-1)

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