exam Maths Puzzle Numerical Ability

I am having difficulty with this question....
I have to find the x intercept of y=x^3-2x^2-8x

and log x+log(x+1)=log 12

can someone please help me..

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exam Other Question

Can you find the slope and y-intercept of the line?

4x+3y=7-6y 1) Use the arithmetic sequence of numbers 2, 4, 6, 8, 10� to find the following:

a) What is d, the difference between any two consecutive terms?

b) Using the formula for