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Simplifying 121 = a * a Multiply a * a 121 = a2 Solving 121 = a2 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a2' to each side of the equation. 121 + -1a2 = a2 + -1a2 Combine like terms: a2 + -1a2 = 0 121 + -1a2 = 0 Add '-121' to each side of the equation. 121 + -121 + -1a2 = 0 + -121 Combine like terms: 121 + -121 = 0 0 + -1a2 = 0 + -121 -1a2 = 0 + -121 Combine like terms: 0 + -121 = -121 -1a2 = -121 Divide each side by '-1'. a2 = 121 Simplifying a2 = 121 Take the square root of each side: a = {-11, 11}
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