exam Maths Puzzle Numerical Ability

How do you find zeros and their multiplicities for f(x)= (x-4)(x+5)(x^2-9)?
Thank you.

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exam Other Question

Hello! can you please help me how to make a word problem for this
equation: t + u = 7
10t + u + 9 = 10u + t

Please...this equation has only one word problem.
I really need help with this problem. will someone please help me? I think I left a number out of this problem earlier. y=-1/3x+2