3 years ago

Multiply (6 + 2i)(6 - 2i)

Mathematics

2 answers:

Shtirlitz [24]3 years ago

8 0

Answer:

4i^2 - 36

Step-by-step explanation:

(6+2i)(6-2i)

(2i * 2i) = 4i^2

(2i * -6) = -12i

(2i * 6) = 12i

(-6 * 6) = -36

combine like terms

4i^2 - 36

Aleksandr-060686 [28]3 years ago

3 0

Answer:

Step-by-step explanation:

(6 + 2i)(6 - 2i)=40

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Is the sqrt of 102 a rational or irrational number?

lesantik [10]

Answer:

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Step-by-step explanation:

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The diameter and height of this cylinder are equal to the side length, S, of the cube in which the cylinder is inscribed. What i

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3 years ago

Least common denominator?

Over [174]

Answer:

$\large\boxed{(s-2)(s+2)(s-3)=(s^2-4)(s-3)=s^3-3s^2-4s+12}$

Step-by-step explanation:

$s^2-4=s^2-2^2=(s-2)(s+2)\\\\\text{used}\ a^2-b^2=(a-b)(a+b)\\\\s^2-5s+6=s^2-2s-3s+6=s(s-2)-3(s-2)=(s-2)(s-3)\\\\\text{Therefore}\ LCD(s^2-4,\ s^2-5s+6)=(s-2)(s+2)(s-3)$