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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
4.27 Simplification - II

Example:
When x=2, 8x3+2x2+3x-5 =73

Solution: For this we substitute the value of x in the given equation and check LHS=RHS.
That is first we take LHS = 8x3+2x2+3x-5 and substitute the x value in LHS, we get
= 8(2)3 + 2(2)2 + 3.2 - 5
= 8.8 + 2.4 + 6 - 5
= 64 + 8 + 6 - 5
= 78 - 5
= 73
= RHS
Therefore LHS = RHS, so the given statement is True.


Directions: Check if the given statements are true or false. Also write at least ten examples of your own.
Q 1: If x=0, then 3x2-6x+5 = 5
False
True

Q 2: If x=-2, then 3x2-6x+2 = 26
False
True

Q 3: If x=5, then 7x2+3x+2 = 157
False
True

Q 4: If x=-4, then 4x2+7x-2 = 74
False
True

Question 5: This question is available to subscribers only!

Question 6: This question is available to subscribers only!


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