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Expand the expression $\left(x+2\right)^2$ using the square of a binomial: $(a+b)^2=a^2+2ab+b^2$
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$x^{2}+4x+4+5\left(x+2\right)-6=0$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation (x+2)^2+5(x+2)+-6=0. Expand the expression \left(x+2\right)^2 using the square of a binomial: (a+b)^2=a^2+2ab+b^2. Subtract the values 4 and -6. Multiply the single term 5 by each term of the polynomial \left(x+2\right). Combining like terms 4x and 5x.