Tutor profile: Anthony R.
In the complex number system, what is the value of the product (4 -2i)(4 -2i)?
(4 -2i)(4 -2i) 4^2-〖(2i)〗^2 difference of two squares 16 -4i^2 16 – 4(-1) i^2= -1 16 + 4 20
Given two forces of 5N and 3N respectively, what is the smallest resultant possible?
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
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?
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
needs and Anthony will reply soon.