book Maths Puzzle Numerical Ability

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Find the perimeter of the triangle if the three sides are:
4, sqrt 5 - sqrt 5, sqrt 5 + sqrt 5

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book Other Question

The degree three polynomial f(x) with real coefficients and leading coefficient 1, has 4 and 3 + i among its roots. Express f(x) as a product of linear and quadratic polynomials wi If 3(4x+5(3.14))=P, then 6(8x+10(3.14))=

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