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Simplify the product $-(x+8)$
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$3\left(x-2\right)\left(x+4\right)+\left(-x-8\right)x+\left(3x+1\right)^2+\left(x+5\right)^2=0$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation 3(x-2)(x+4)-x(x+8)(3x+1)^2(x+5)^2=0. Simplify the product -(x+8). Multiply the single term 3\left(x+4\right) by each term of the polynomial \left(x-2\right). Multiply the single term 3x by each term of the polynomial \left(x+4\right). Expand \left(3x+1\right)^2.