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poizon [28]
3 years ago
9

How to factor 25x^2 - 81= 0

Mathematics
1 answer:
dalvyx [7]3 years ago
4 0
Your question is a difference of squares. both terms that need to be factored are squared. to solve take the square root of each put into two terms one of addition and one of subtraction.

anwser= (5x-9)(5x+9)

the reason this works is because when you foil you get
25x²-45x+45x-81 
the middle terms cancel revealing
25x²-81
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42 points!
kupik [55]

Answer:

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5 0
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7 0
3 years ago
An item was sold at a loss of 20%. Had it been sold for Rs 3000more then the profit would have been 10%. What is the cost price
vagabundo [1.1K]

Answer:

Cost Price = Rs 10000

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Assume:

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3 0
3 years ago
I need help please?!!!
yanalaym [24]
Answer is: C


√11 ≈ 3.3661
Which the closest to your answers is 3.3
5 0
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