book Maths Puzzle Numerical Ability

A Traingle has sides 3x + 7 , 4x - 9, and 5x + 6. Find the expression that represents its perimeter.

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book Other Question

find the value of -
(i+3^.5)^100 + (i-3^.5))^100 + 2)^100
Explain how to multiply two binomials using the FOIL method.