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Expand the expression $\left(x+5\right)^2$ using the square of a binomial: $(a+b)^2=a^2+2ab+b^2$
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$x^{2}+10x+25+3x=\left(x+3\right)\left(2x-1\right)$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation (x+5)^2+3x=(x+3)(2x-1). Expand the expression \left(x+5\right)^2 using the square of a binomial: (a+b)^2=a^2+2ab+b^2. Combining like terms 10x and 3x. Multiplying polynomials x+3 and 2x-1. Simplify the product -(x+3).