101k views
11 votes
Square root of 3x+ 4 = 5.

Square root of 3x+ 4 = 5.-example-1
User SilverFire
by
8.7k points

2 Answers

9 votes

Answer:


7

Step-by-step explanation:


~~~~~~√(3x+4) = 5\\\\\implies \left(√(3x+4) \right)^2 = 5^2\\\\\implies 3x+4 = 25\\\\\implies 3x = 25 -4 \\\\\implies 3x = 21\\\\\implies x= \frac{21}3\\\\\implies x = 7


\textbf{Verification:}\\\\~~~~~~√(3 * 7 +4) =5\\\\\implies √(21+4) = 5\\\\\implies √(25) = 5\\\\\implies 5 = 5 \checkmark

9 votes

Answer:

x = 7

Step-by-step explanation:

√3x + 4 = 5

square root both sides

(√3x + 4)² = 5²

simplify

3x + 4 = 25

collect into groups

3x = 21

divide both sides by 3

x = 7

User Meisyal
by
8.7k 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