exam Maths Puzzle Numerical Ability

Find the product: [x - ( 2 + i)][x - (2 - i)].

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exam Other Question

the problem is 1/2-5/8x=7/8x+7/2
do I use the reciprocal method to get rid of 7/8 to get x by itself? Can you please help me on the following problem: "A rectangle whose perimeter is 200 is 4 times as long as it is wide. Find the dimensions and area." CAn you please help me.