Question

6. There are 105 pens in a box. To find the number of pens in 95 such boxes, which of the following identity
will be used?
a. (a+b) (a-b)=a2-b2
b. (x+a) (x+b) = x2+(a+b)x+ab
c. (a+b)2= a +2ab+b?
d. (a-b)2 = a +2ab+b?​

Answer 1

Answer:

(a + b ) (a -b) = a2 - b2

Step-by-step explanation:

105 * 95

(100+ 5) * (100 -5)

(100)2 - (5)2

10000 - 25

9975

Answer 2

Answer:

a box can contain 1 05 pens ; then how many similar boxes will be required for packing 30753975 pens.