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Which of the following are solutions to the equation below (5x+1)^2=7? Check all that apply.
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Which of the following are solutions to the equation below (5x+1)^2=7?

Check all that apply.

Which of the following are solutions to the equation below (5x+1)^2=7? Check all that-example-1
User Jonhnny Weslley
by
7.8k points

2 Answers

5 votes

Answer:C E (apex) !!


Explanation:


User JosephGarrone
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6 votes
(5x+1)² = 7; expand: 25x² + 10x +1 = 7 or 25x² + 10x -6 = 0

Solve this quadratic for x:

x = [-b + √(b² - 4ac)]/2a and x = [-b - √(b² - 4ac)]/2a
Plug the values and you'll find :
x = (- √7 - 1)/5 (answer C)
x = (+√7 -1)/5 (answer E)

User Brendan Vogt
by
7.5k points
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