factorise:-(2.5×10^-4)^2
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Answer:
-(2.5×10^-4)²
Step-by-step explanation:
-(2.5×10^-4)²
10^-4=-10×-10×-10×-10
=1000
-(2.5×1000)²
-(250)²
-(250×250)
-(62500)
-62500