exam Maths Puzzle Numerical Ability

Find the perfect square trinomial whose first two terms are given.
x square + 8x

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exam Other Question

Radioactive strontium-90 is used in nuclear reactors and decays exponentially with an annual rate of decay of 2.48%. How much pf 50 grams of strontium-90 will be left after 100 years? the winner of a race ran the distance in 45s at an average speed of 9.6m/s. the runner who came in last finished in 48s what was the last runners average speed?

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