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Factorizing the difference between two squars(4)
Contributed by: Mohamed
  • 1. Factorize: x2 - 9
A) (x - 3 ) ( x - 3)
B) ( x - 3)2
C) (x + 3 ) ( x + 3)
D) (x + 3 ) ( x - 3)
  • 2. Factorize: 4 x2 - 25y2
A) (2x + 5y ) (2 x + 5y)
B) (2x + 5y )2
C) (2x + 5y ) (2 x - 5y)
D) (2x - 5y ) (2 x - 5y)
  • 3. Factorize: m2 - 1
A) (m - 1)2
B) (m + 1 ) (m - 1)
C) (m - 1 ) (m - 1)
D) (m + 1 ) (m + 1)
  • 4. Factorize: 225 x2 - y2
A) (15x - y ) (15x- y)
B) (15x + y ) (15x+ y)
C) (15x + y ) (15x- y)
D) (15x + y2 ) (15x- y2)
  • 5. Factorize: 36 x2 -100
A) (6x - 10 ) (6x- 10)
B) (6 x - 10 )2
C) 4(3x + 5 ) (3x+ 5)
D) 4(3x + 5 ) (3x- 5)
  • 6. complete : ( a + b ) ( a - b) =....
A) (a - b ) 2
B) a2 - b2
C) (a + b ) 2
D) a2 + b2
  • 7. if: x+y=5 , x-y = 2 then x2-y2 =.......
A) 10
B) 2
C) 3
D) 7
  • 8. if: a2-b2=20 , a+b = 10 then a-b =.......
A) 10
B) 2
C) 8
D) 18
  • 9. if: a2-b2=12 , a-b = 2 then a+b =.......
A) 24
B) 6
C) 14
D) 10
  • 10. if: x2-a=(x+3)(x-3)then a = .......
A) 9
B) 3
C) 6
D) zero
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