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Move everything to the left hand side of the equation
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$\left(2x+3\right)^2-4\left(x-1\right)\left(x+3\right)-x^2=0$
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. Move everything to the left hand side of the equation. Expand \left(2x+3\right)^2. The power of a product is equal to the product of it's factors raised to the same power. Combining like terms 4x^2 and -x^2.