21x^2-62-16=0

Solution for 21x^2-62-16=0 equation:

Simplifying
21x2 + -62 + -16 = 0

Reorder the terms:
-62 + -16 + 21x2 = 0

Combine like terms: -62 + -16 = -78
-78 + 21x2 = 0

Solving
-78 + 21x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '78' to each side of the equation.
-78 + 78 + 21x2 = 0 + 78

Combine like terms: -78 + 78 = 0
0 + 21x2 = 0 + 78
21x2 = 0 + 78

Combine like terms: 0 + 78 = 78
21x2 = 78

Divide each side by '21'.
x2 = 3.714285714

Simplifying
x2 = 3.714285714

Take the square root of each side:
x = {-1.927248223, 1.927248223}