NO LINKS - death valley is the hottest place in the united states. the highest temperature ever recorded there was 134F the lowe
st temperature recorded there was 15F write two inequalities that would describe the temperature, in degrees fahrenheit, in death valley at any time since temperatures have been recorded
Because this is a fourth degree that will be tricky to factor as it is, we will do a u substitution. Let . We can now rewrite that polynomial in terms of u: . Filling into the quadratic formula we have . Simplifying down and or . That means that u = 8 or u = -1. But don't forget that we let , so we have to put x-squared back in for u. That gives us which simplifies down to . That also gives us . When we take the square root of -1, we have to use the fact that -1 = i^2, so we sub that in to get . All in all, your solutions are as follows: which is choice b.