Question

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Answer 1

Any integer is a rational number. That may help

Answer 2

anything minus itself is 0

and 0 is rational

Answer 3

s there both yeses?

Answer 4

yes. for the 2nd one we can write sqr(3) * sqr(12) as sqr(3*12) = sqr(3*2 * 3*2)
we have two pairs: 2 and 3, so that becomes 2*3 = 6

or we could do sqr(3*12) = sqr(36) = 6

so you get

2 * sqr(3) * sqr(12) = 2* 6 =12
and 12 is rational

Answer 5

Ok Thank you so much for explaining! ^.^