10a*a+2=42

Solution for 10a*a+2=42 equation:

Simplifying
10a * a + 2 = 42

Multiply a * a
10a2 + 2 = 42

Reorder the terms:
2 + 10a2 = 42

Solving
2 + 10a2 = 42

Solving for variable 'a'.

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

Add '-2' to each side of the equation.
2 + -2 + 10a2 = 42 + -2

Combine like terms: 2 + -2 = 0
0 + 10a2 = 42 + -2
10a2 = 42 + -2

Combine like terms: 42 + -2 = 40
10a2 = 40

Divide each side by '10'.
a2 = 4

Simplifying
a2 = 4

Take the square root of each side:
a = {-2, 2}