Question

Which of the following are solutions to the equation below?

Check all that apply.
9x² - 6x + 1 =7
O A. x= 2√2
B. x = -√7+1
3
☐ C. X=
□ D. X=
√√7+1
3
+1
□ E. x = 2√2
3
O F. X= -√2+1

Answer 1

Answer: C and B

Explanation:

`9x^2 - 6x+1=7\\\\9x^2 - 6x-6=0\\\\x=(-(-6) \pm √((-6)^2 - 4(9)(-6)))/(2(9))\\\\x=(6 \pm √(252))/(18)\\\\x=(1 \pm √(7))/(3)`