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harina [27]
2 years ago
12

Help on my test very important

Mathematics
2 answers:
Rufina [12.5K]2 years ago
7 0

Hey buddy I am here to help!

The first one is false as the answer should be  diameter = 9cm

The second one i dont know sry

Hope it helps!

vichka [17]2 years ago
5 0
1. False, the diameter has to be bigger than the radius.
2. True, tangent lines have to be perpendicular.
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What polynomial identity should be used to prove that 35 = 8 + 27
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Sum of cubes identity should be used to prove 35 =3+27

Step-by-step explanation:

Prove that : 35 = 8 +27

Polynomial identities are just equations that are true, but identities are particularly useful for showing the relationship between two apparently unrelated expressions.

Sum of the cubes identity:

a^3+b^3=(a+b)(a^2-ab+b^2)

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We can write 8 as 2 \times 2 \times 2 = 2^3 and 27 as 3 \times 3 \times 3 = 3^3.

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8+27 = 2^3+3^3

Now, use the sum of cubes identity;

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2^3+3^3 = (5)(4-6+9) = 5 \cdot 7 = 35 = LHS    proved!

therefore, the Sum of cubes polynomial identity should be used to prove that 35 = 8 +27

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