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How to Solve A Hard Equation Easily (Algebra & Precalculus Trick)
Learn how to solve this 4th-degree polynomial equation with substitution. We will solve (x^2+6x+1)(x^2+6x-3)=5, and of course, we shouldn't expand it right away. So, watch and see how to use a clever substitution to help us solve that equation! ----------------------------- I help students master the basics of math. You can show your support ...
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