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Find the roots of the equation using the Quadratic Formula
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$\left(x+3\right)^2+\left(y-4\right)^2=21$
Learn how to solve equations problems step by step online. Find the roots of (x+3)^2+(y-4)^2=21. Find the roots of the equation using the Quadratic Formula. Expand the expression \left(x+3\right)^2 using the square of a binomial: (a+b)^2=a^2+2ab+b^2. We need to isolate the dependent variable , we can do that by simultaneously subtracting x^{2}+6x+9 from both sides of the equation. Simplify the product -(x^{2}+6x+9).