209k views
5 votes
The area of a circle is pi(9x2 + 6x + 1) square cm. Find an expression for the length of the circles radius

User Kufudo
by
8.1k points

1 Answer

3 votes

Answer:

r = 3x + 1

Explanation:

The area (A) of a circle is calculated as

A = πr² ( r is the radius )

Here

πr² = π(9x² + 6x + 1) ← divide both sides by π

r² = 9x² + 6x + 1 ← perfect square

r² = (3x + 1)² , thus

r = 3x + 1

User Moulick
by
9.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories