Answer:
20x³ -45x
Step-by-step explanation:
The least common multiple of two expressions is the product of their unique factors.
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4x³ -9x = x(4x² -9) = x(2x -3)(2x +3) . . . . factors of 1st expression
10x² -15x = 5x(2x -3) . . . . . . . . . . . . . . . . factors of 2nd expression
The unique factors are 5, x, (2x -3), and (2x +3). Their product is ...
5(4x³ -9x) = 20x³ -45x . . . . least common multiple
Use math away it’s a really good source
So first make sure thtat the bottom number is the same so
7 and 3 and 2
multily them together and get 42
so multtiply 3/7 by 6/6 or 1=18/42
multiply 2/3 by 14/14=28/42
multply 1/2 by 21/21=21/42
18/42+28/42+21/42=(18+28+21)/42=67/42
simplify
1 and 25/42 miles
