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Elina [12.6K]
3 years ago
6

Which expressions are differences of squares?

Mathematics
1 answer:
Lina20 [59]3 years ago
8 0
Difference of 2 perfec squares is
(a^2)-(b^2)




if the exponents are both even and the coeficient (the number in front) are perfect squares, then it is difference t 2 perfect squares

first one
8 is not perfect square


2nd one
(4e^4)^2-(9g^2)^2


third
25 is odd, so it cannot be split up into 2 nice numbers

4th
(11m^9)^2-(3n^5)^2
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Answer: 40.27

Step-by-step explanation:

Let their September bill be x

Therefore, the October bill will be = x - 3.87.

Therefore, the addition of both bills will be:

x + (x - 3.87) = 237.75

x + x - 3.87 = 237.75

2x - 3.87 = 237.75

2x = 237.75 + 3.87

2x = 241.62

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Therefore, September bill was 120.81

Since the 3 students share the bull equally, the amount owed by each will be:

= 120.81 / 3

= 40.27

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3 years ago
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