Pyae Phyo Kyaw's answer to .'s Secondary 4 A Maths Singapore question.
Hmm answer given is 1/rt41(-4i-5j). Thx!!
It’s the same answer, just divide by 2 for both numerator and denominator. To divide by 2 inside the square root add power 2 i.e. 2^2=4 and so sqrt(164/4)=sqrt41