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Moving the term $-4$ to the other side of the inequation with opposite sign
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$x^2-4x\leq 0+4$
Learn how to solve inequalities problems step by step online. Solve the inequality x^2-4x+-4<=0. Moving the term -4 to the other side of the inequation with opposite sign. Add the values 0 and 4. Factor the polynomial x^2-4x. Add and subtract \left(\frac{b}{2}\right)^2, replacing b by it's value -4. Now, we can factor x^2+-4x+4 as a squared binomial of the form \left(x+\frac{b}{2}\right)^2.