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Combining like terms $x^2$ and $3x^2$
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$4x^2-28x$
Learn how to solve factorization problems step by step online. Factor the expression x^2+3x^2-28x. Combining like terms x^2 and 3x^2. We will use the complete the square method to complete the polynomial 4x^2-28x. First, factor both terms by the coefficient of the term ax^2, which is 4. Add and subtract \left(\frac{b}{2}\right)^2, replacing b by it's value -7. Now we can factor x^2+-7x+\frac{49}{4} as a squared binomial of the form \left(x+\frac{b}{2}\right)^2.