X/7 + 9 = 3
a number: x
a number divided by 7: x/7
sum of number divided by 7 and 9: x/7 + 9 (and means plus)
equals 3: x/7 + 9 = 3
Answer: D
Step-by-step explanation:

Answer:
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C and D
x^2 - 4x + 4 = (x-2)^2
x^2 + 10x +25 = (x+5)^2