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Tutor profile: Anthony R.

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Anthony R.
Have been tutoring for 10 years with overwhelming success.
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Questions

Subject: SAT

TutorMe
Question:

In the complex number system, what is the value of the product (4 -2i)(4 -2i)?

Inactive
Anthony R.
Answer:

(4 -2i)(4 -2i) 4^2-〖(2i)〗^2 difference of two squares 16 -4i^2 16 – 4(-1) i^2= -1 16 + 4 20

Subject: Physics

TutorMe
Question:

Given two forces of 5N and 3N respectively, what is the smallest resultant possible?

Inactive
Anthony R.
Answer:

The smallest possible resultant of the two stated vectors will occur when both vectors are anti-parallel to each other. The resultant will the be (5N - 3N) = 2N

Subject: Algebra

TutorMe
Question:

John is x yrs old and his sister Jane is (x-5) yrs old, if the product of their ages is 6 yrs how old is John?

Inactive
Anthony R.
Answer:

x(x-5)=6 x^2-5x=6 x^2-5x-6=0 (x-6)(x+1)=0 Either (x-6)=0 or (x+1)=0 Hence, x=6 or x=-1 Since x represents years it therefore has to be positive and hence x=6

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