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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
4.29 Fill in the Blanks - I

Example:
(2x-3)(4x+5) = 8x2_____-15.

Solution:
Here the middle term is missing.
Middle Term = multiply the two terms which are at the extremes and which are in the middle and add the result.
That is (2x).5 + (-3)(4x) = 10x-12x
= -2x.
Therefore (2x-3)(4x+5) = 8x2-2a-15.


Directions: Fill in the blanks for the following problems. Also write at least ten examples of your own.
Q 1: (5a+4)(6a+9) = 30a2+___+36.
Answer:

Q 2: (8x-9)(3x-9) = 24x2___+81.
Answer:

Q 3: (2a+4)(3a+4) = 6a2+___+16.
Answer:

Q 4: (x-1)(3x-4) = 3x2-7x+___.
Answer:

Q 5: (7x+2)(2x+2) = 14x2+___+4.
Answer:

Q 6: (2x-4)(3x-4) = 6x2-___+16.
Answer:

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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