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Subtract the values $1$ and $-1$
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$3\left(x+1\right)^2+x$
Learn how to solve simplification of algebraic expressions problems step by step online. Simplify the expression 3(x+1)^2+x+1+-1. Subtract the values 1 and -1. A binomial squared (sum) is equal to the square of the first term, plus the double product of the first by the second, plus the square of the second term. In other words: (a+b)^2=a^2+2ab+b^2. Multiply the single term 3 by each term of the polynomial \left(x^2+2x+1\right). Multiply 2 times 3.