exam
Maths Puzzle
Numerical Ability
1. (3+2i)squared(3-2i)squared
(3+2i)(3+2i)(3-2i)(3-2i)
9+6i+6i+4isquared 9-6i-6i+4isquared
9+12i+4(-1) 9-12i+4(-1)
(5+12i)(5-12i)
=169
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exam Other Question
t < -3
How would you do this problem?
2a^2-ab+b^2(a-2b)
I dont know if i should use distribution or foil to do this. Please help Thank you