Answer:
7x2-1 = 0
Step-by-step explanation:
Add 1 to both sides of the equation :
7x2 = 1
Divide both sides of the equation by 7:
x2 = 1/7 = 0.143
When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:
x = ± √ 1/7
Answer:
Step-by-step explanation:
Rewrite 7x^2 + 1 = 0 as 7x^2 = - 1, and then as x^2 = -1/7.
Taking the square root of both sides, and remembering that the square root of a negative number is imaginary, we get:
i√7
x = ±i(1/7) = ± ----------
7
