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b) (2x-3)²=(2x)²-2*2x*3+3²=4x²-12x+9
c) (4-2m)²=4²-2*4*2m +(2m)²=16-16m+4m²
d) (3a-b)²=(3a)²-2*3a*b+b²=9a²-6ab+b²
e) (ax-5a)²= (ax)²-2*ax*5a+(5a)²=a²x²-10a²x+25a²
f) (x²-2)²=(x²)²-2*x²*2 +2²=x^4-4x²+4
g) (√2-5)²=(√2)²-2*√2*5+5²=2-10√2+25=27-10√2
h) (2-√3)²=2²-2*2*√3+√3²=4-4√3+3=7-4√3
i) (√32-√2)²=√32²-2*√32*√2+√2²=32-2√64+2=34-2*8=34-16=33