exam Maths Puzzle Numerical Ability

Find the LCD of
7 8
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a^2 + 2a - 63 a + 9

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exam Other Question

if f(x) = x(x+3)(x-1), use interval notation to give all values of x where
f(x)>0. Write the fraction as a percent.

6. 13/20

Any help with this equation would be Greatly</b> appreciated.