(x + 2)^2 = x^2 + 4x + 4 is?
- A linear equation
- Cubic equation
- An identity
- An equation
Explanation
- The given equation (x + 2)^2 = x^2 + 4x + 4 is an identity because it is true for all values of x.
- An identity is an equation that is always true, and this equation is simply the result of expanding the left-hand side using the binomial theorem.
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