y = -1/(3x7 + 2x - 9)
y = -(3x7 + 2x - 9)-1
y' = -(-1)(3x7 + 2x - 9)-2(3x7 + 2x - 9)'
y' = (3x7 + 2x - 9)-2(21x6 + 2)
y' = (21x6 + 2)/(3x7 + 2x - 9)2
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9
2/3 x 9/10 = (2x9)/(3x10) = 18/30 = 18÷6/30÷6 = 3/5
7x9 is the multiplication fact that can be found using the arrays 2x9 and 5x9.
As a product of its prime factors: 2*3*3 = 18
2x2x3x3x5This question is equivalent to asking for the prime factorization:180 = 10x18 =(2x5)x(2x9) = 2x5x2x(3x3) = 2x2x3x3x5