book Maths Puzzle Numerical Ability

solve the following equation by finding its zeros.

x^3+9x^2+26x+24=0

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book Other Question

The spoke of a wheel reaches from the center of the wheel to its rim. If the circumference of the rim of the wheel is 42 inches, how long is each spoke? Round your answer to the ne I need help on this problem:

Three times the greatest of three consucutive intergers exceeds twice the least by 38. Find the intergers.