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igomit [66]
3 years ago
15

4 zadaniena 97 stronie klasa7 GWO

Mathematics
1 answer:
Rom4ik [11]3 years ago
3 0

Answer:

1

Step-by-step explanation:

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The area of a rectangle is (81x2 − 4y2) square units. Determine the dimensions of the rectangle by factoring the area expression
oksano4ka [1.4K]

Answer:

The dimension of the rectangle are 9\cdot x - 2\cdot y units and 9\cdot x + 2\cdot y units, respectively.

Step-by-step explanation:

Geometrically speaking, the area of a rectangle is equal to the product of its base and its height. If we know that area of the figure is 81\cdot x^{2} - 4\cdot y^{2} square units, then we proceed to factor the expression:

1) A = 81\cdot x^{2} - 4\cdot y^{2} Given

2) A = (9\cdot x -2\cdot y)\cdot (9\cdot x + 2\cdot y) a^{2} - b^{2} = (a + b) \cdot (a - b)/Result

The dimension of the rectangle are 9\cdot x - 2\cdot y units and 9\cdot x + 2\cdot y units, respectively.

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3 years ago
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Answer:

39

Step-by-step explanation:

square= lw

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you add 30 + 9 which will give you 39

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3 years ago
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Step-by-step explanation:

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i hope this is right.

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