Which rational expression has a value of 0 when x = -2?
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5x-5
-3x²+6
2x - 4
x² - 4

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

the answer is "focused on"

lol gave an answer 1 week that's the answer for those who need it in the future xd

because he created electricity