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zheka24 [161]
3 years ago
9

4y^2-16 is that a square of the sum, square of a difference, a product of a sum and difference, or not a special product?

Mathematics
1 answer:
Sindrei [870]3 years ago
3 0
Das is differnce of 2 perfect squaes

for

a^2-b^2, that factors to (a-b)(a+b0


4y^2=(2y)^2
16=4^2


(2y)^2-(4)^2=(2y-4)(2y+4)
square of a differnce
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Let A =  amount borrowed from bank A.
Let B =  amount borrowed from bank B.

The total loan is $55,000.
Therefore
A + B = 55000                  (1)

Bank A charges 8% interest. The interest after 1 year is 0.08A.
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Jack's Loan.
A = loan from bank A.
B = loan from bank B.
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A + B = 10000                  (4)

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From (4), obtain
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Substitute (6) into (5).
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