medium · GMAT Quant
An automated manufacturing control function f(x) is defined for all real numbers x by f(x) = begincases 2x|x| - 5x + 1, & x ≥ 0 -2x|x| - 5x + 1, & x < 0 endcases
Which of the following expressions represents the simplified form of g(x) = f(x) + f(-x) for all real numbers x?
- 4x^2 + 2
- 4x^2 - 10x + 2
- -10x
- 2
- 0
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