Tamara J. answered • 04/25/13

Math Tutoring - Algebra and Calculus (all levels)

0.5x^{2} + 0.4x^{2} - 0.2x^{2}

Notice that all three term share a common factor, that being x^{2} . Factoring out x^{2} from all three terms, we arrive at the following:

x^{2}(0.5 + 0.4 - 0.2) = x^{2}(0.7) = **0.7x**^{2 }

Likewise, since all three terms have a common base (x^{2}) they are like terms and can thus be combined. That is, we can simply combine the coefficients of each term and keep the common base.