exam Maths Puzzle Numerical Ability

Simplify by combining like terms.

square root of 98 + 3 square root of 50 - 3 square root of 8


8 square root of 5 - 11 square root of 5 + 3 square root of 5

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exam Other Question
x*+ax+b is a factor of the polynomial x^+qx*+rx+s.
Prove that r-b=a(q-a) and s=b(q-a). if LP is 10 cm, LN is 14 cm, and Pn is 12, what is the perimeter of triangle LNP?