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Moving the term $-15$ to the other side of the inequation with opposite sign
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$x^2+2x>0+15$
Learn how to solve inequalities problems step by step online. Solve the inequality x^2+2x+-15>0. Moving the term -15 to the other side of the inequation with opposite sign. Add the values 0 and 15. Factor the polynomial x^2+2x. Add and subtract \left(\frac{b}{2}\right)^2, replacing b by it's value 2. Now, we can factor x^2+2x+1 as a squared binomial of the form \left(x+\frac{b}{2}\right)^2.