2275/6 or 379.1667. You multiply the top (numerators) parts of the fractions and then the bottom (denominators). You then divide them.
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I am 100% sure the answer is a.4
Because it was (2,3) then became (8,12)
2*4= 8 and 3*4= 12
The numbers 2 and 3 were multiplied by 4 to get 8 and 12
So, You want to square 4 and 5. Subtract 16 from 25. then fix the squaring. After getting the missing side. You want to subtract 2 or add one and divide by four.
So x = 1. Hope this helps.