PRACTICE QUESTIONS FOR X PLUS a TIMES X PLUS b

Problem 1 :

Expand (x+3) (x+2) 

 (A) x²+5x+6

 (B) x²-5x+6

 (C) x²+5x-6

Problem 2 :

Expand (x+3) (x-2)

 (A) x²+x+6

 (B) x²-x-6

 (C) x²+x-6

Problem 3 :

Expand (x+6) (x-1)

 (A) x²+5x-6

 (B) x²-5x-6

 (C) x²+5x+6

Problem 4 :

Expand (2a+3) (2a-8)

 (A) 4a²+10a+24

 (B) 4a²+10a-24

 (C) 4a²-10a-24

Problem 5 :

Expand (x+8)(x-5)

 (A) x²-3x-40

 (B) x²+3x-40

 (C) x²+3x+40

Problem 6 :

Expand  (a-11) (a-13)

 (A) a²+24a-143

 (B) a²-24a-143

 (C) a²-24a+143

Solutions for Practice Questions

Problem 1 :

Expand (x+3) (x+2) 

Solution :

  =  x²+2x+3x+6

  =  x²+5x+6

Problem 2 :

Expand (x+3) (x-2)

Solution :

  =  x²+2x+3x+6

  =  x²+5x+6

Problem 3 :

Expand (x+6) (x-1)

Solution :

  =  x²+6x-x-6

  =  x²+5x-6

Problem 4 :

Expand (2a+3) (2a-8)

Solution :

=  (2a)² -16a+6a-24

=  4a²-10a-24

Problem 5 :

Expand (x+8)(x-5)

Solution :

=  x²-5x+8x-40

=  x²+3x-40

Problem 6 :

Expand  (a-11) (a-13)

Solution :

=  x²-5x+8x-40

=  x²+3x-40

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