Question

9x² - 6xy + y² - 2
help me
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Answer 1

Step-by-step explanation:

The first half of the distance takes d km/30 kmph = d/30 hr. The second half of the distance takes d km/50 kmph = d/50 hr. So the total time taken to cover 2d km = (d/30)+(d/50) = 80d/150 hr. = 37.5 kmph

Answer 2

Step-by-step explanation:

given

9x^2 - 6xy + y^2 - 2

81x-6xy+2y-2