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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: $(a+b)^2=a^2+2ab+b^2$
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$\left(2x\right)^2+12x+9-4\left(x-1\right)\left(x+3\right)=x^2$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation (2x+3)^2-4(x-1)(x+3)=x^2. 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. The power of a product is equal to the product of it's factors raised to the same power. Grouping all terms to the left side of the equation. Combining like terms 4x^2 and -x^2.