find the product of each sum and difference. (2l + 9)(2l – 9)

(a) 4l2 + 18l – 81

(b) 4l2 – 81

(c) 4l2 + 81

(d) 4l

Option c

Explanation:

As we have given in the question  

So by using the formula

So the equation will become

So according to question,  we have ,

a = 2l and b = 9

So,

And required Sum=

So the final answer of the question which is required is  Sum=

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.

answer. d.289 hope that