163k views
3 votes
Solve the equation.
3x^2+40=-x^2-56

User Zelgadis
by
7.4k points

1 Answer

2 votes

Answer:

x = ± 2i
√(6)

Explanation:

Given

3x² + 40 = - x² - 56 ( add x² to both sides )

4x² + 40 = - 56 ( subtract 40 from both sides )

4x² = - 96 ( divide both sides by 4 )

x² = - 24 ( take the square root of both sides )

x = ±
√(-24)

= ±
√(4(6)(-1)) → note
√(-1) = i

= ± 2i
√(6)

User Lexandro
by
8.9k 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