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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
7.13 Formula for (a+b)^2 - Square of a Binomial

(a+b) is a binomial and the square of a binomial means (a+b)2.
To find the square of a binomial
That is (a+b)(a+b) = a.a + a.b + b.a + b.b
= a2 + ab + ba + b2
= a2 + ab + ab + b2 ....(Commutative Property)
= a2 + 2ab + b2
\(a+b)2 = a2+2ab+b2

In verbal
[First term+Second term]2=[First term]2+2.[First term].[Second term]+[Second term]2


Directions: Solve the following problems. Also write at least ten examples of your own.
Q 1: (5x+3)2 = _____?
25x2+25x+9
25x2+30x+9
25x2+30x+15

Q 2: (9x+9)2 = _____?
91x2+162x+81
81x2+16x+81
81x2+162x+81

Q 3: (3x+4)2 = _____?
9x3+24x+16
9x2+14x+16
9x2+24x+16

Q 4: (2x+2)2 = _____?
49x2+8x+4
4x2+8x
4x2+8x+4

Q 5: (2x+1)2 = _____?
4x2+4x+1
6x2+4x+1
4x2+8x+1

Q 6: (7x+7)2 = _____?
49x2+98x+49
49x2+81x+49
49x3+98x+49

Q 7: (6x+5)2 = _____?
36x2+60x+25
36x2+56x+25
46x2+60x+25

Q 8: (x+1)2 = _____?
x2+2x+1
x2-2x+1
2x2+2x+1

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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