exam Maths Puzzle Numerical Ability

Use a special product to square the following binomial.
(2.5m - 0.4n)^2

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exam Other Question

peter started driving at 4:50 and is driving at an average speed of 30 mi/hr. dina is driving at an average of 40 mi/ hr. and she started driving at 5:20 if they both started driving from the same point, after how many hours would the meet? 5(y+3)-2y=6