e-an-error-if-so-give-the-correct-simplification-and-explain-the-mistake-briefly

Question

A student simplified 5x2+3x−(2x2−$$4x+1)5x^2 + 3x$$ - $$(2x^2 - 4x + 1)  $$and wrote 3x2−$$x+13x^2 - x + 1. $$Identify whether the student made an error, and if so, provide the correct simplification.

Accepted Answer

The student made an error: the correct result is 3x2+7x−$$13x^2 + 7x - 1$$

Answer

The student is correct

Answer

The student made an error: the correct result is 3x2+x−13x² + x − 1

Answer

The student made an error: the correct result is 7x2+4x−$$17x^2 + 4x - 1$$

A student simplified 5x2+3x−(2x2−4x+1)5x^2 + 3x - (2x^2 - 4x + 1) and wrote 3x2−x+13x^2 - x + 1. Identify whether the student made an error, and if so, provide the correct simplification.

A student simplified $5 x^{2} + 3 x - (2 x^{2} - 4 x + 1)$ and wrote $3 x^{2} - x + 1$ . Identify whether the student made an error, and if so, provide the correct simplification.