2x*2x+4x*4x=42

Solution for 2x*2x+4x*4x=42 equation:

Simplifying
2x * 2x + 4x * 4x = 42

Reorder the terms for easier multiplication:
2 * 2x * x + 4x * 4x = 42

Multiply 2 * 2
4x * x + 4x * 4x = 42

Multiply x * x
4x2 + 4x * 4x = 42

Reorder the terms for easier multiplication:
4x2 + 4 * 4x * x = 42

Multiply 4 * 4
4x2 + 16x * x = 42

Multiply x * x
4x2 + 16x2 = 42

Combine like terms: 4x2 + 16x2 = 20x2
20x2 = 42

Solving
20x2 = 42

Solving for variable 'x'.

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

Divide each side by '20'.
x2 = 2.1

Simplifying
x2 = 2.1

Take the square root of each side:
x = {-1.449137675, 1.449137675}