exam Maths Puzzle Numerical Ability

Multiply using the vertical method.

(2r-3s)(4r squared + 6rs + 9s squared)

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exam Other Question

This is a quadratic equation/ word problem

Y(x) = �3.3x2 + 0.5x + 300.
I need to use this function to tell researchers what value of x produces the maximum output
signal for please help.find the length of the rectangle .top left lable M top right N bottom left P and bottom right O between the P and O is area=4x^3-5x^2-10x-3 between the N and O 4x+3 Th