romeo123321 romeo123321

06-09-2019
Mathematics

contestada

. Explain and correct the error made by a student who simplified this expression. –2x + 7x + 8 (–2 + 7 + 8)x 13x

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carolinazimicz carolinazimicz

10-09-2019

Answer:

Given -2x + 7x + 8, the correct expression is 5x + 8.

Step-by-step explanation:

The student didn´t notice that 8 was not follow by x, and try to apply common factor. But we can´t do that. The correct form to solve this expression is -2x + 7x + 8 = (-2 + 7)x + 8 = 5x +8.

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