Accurate Explanation: Aloha! Basically, as I can see here, you're missing a slope. But you need at least 1 point and a slope in order to write an equation. Hope it helps.
Answer:
the square root of 2 times the negative square root of 2 would be -2, which is a rational number.
3.9
Step-by-step explanation:
√15 = 3.9, rounded.
Notice that
, so
Then taking the positive square root gives
so and .