Question

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Answer 1

Answer:

e) (m-2n)(m+2n)

Using the identity:- (a-b)(a+b)=a²-b²

=(m)²-(2n) ²

=m²-4n²

f) (z+1)/3=(z-1)/2

cross multiply

2(z+1)=3(z-1)

2z+2=3z-3

2z-3z=(-3)-2

(-z) =(-5)

z=5