a*a+20=45

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Solution for a*a+20=45 equation: 


Simplifying
a * a + 20 = 45

Multiply a * a
a2 + 20 = 45

Reorder the terms:
20 + a2 = 45

Solving
20 + a2 = 45

Solving for variable 'a'.

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

Add '-20' to each side of the equation.
20 + -20 + a2 = 45 + -20

Combine like terms: 20 + -20 = 0
0 + a2 = 45 + -20
a2 = 45 + -20

Combine like terms: 45 + -20 = 25
a2 = 25

Simplifying
a2 = 25

Take the square root of each side:
a = {-5, 5}

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