Option D:

Solution:
Given expression is
.
<u>To find the product of the expression:</u>

Multiply each term of the first term with each term of the 2nd term.

Using the exponent rule: 


Arrange the terms with same power.


Hence option D is the correct answer.

Answer:
B) 4cm
Step-by-step explanation:
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Perimeter (P) = 2L + x
4900 = 2L + x ⇒ 4900 - x = 2L ⇒
= L
Area (A) = L · x
A = (
) (x)
= 