exam Maths Puzzle Numerical Ability

Explain why we cannot square a sum by simply squaring each term of the sum. For example, (a+b)square 2 is not equal to a square + b square. Provide appropriate example.

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exam Other Question
State the reciprocal of the number.
0.01







Thanks! Please work really fast! Happy Holidays!~!~!~!~!~!~!~! divide 5+ 3j over 2 + j I did the next step and came up with
10 - j5 + j6 -1 over 2^2 - (j^2)^2 I don't know if I did that right and not sure what to do next.