exam Maths Puzzle Numerical Ability

complete the square, and find the roots of the quadratic equation
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x2 + 16x = 0

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Consumer Awareness: The suggested retail price of a new car is p dollars. The dealership advertised a factory rebate of $1200 and a A rectangular piece of tin 40cm by 30cm is to be made into an open box with a base of 900cm cubed by cutting equal squares from the four corners and then bending up the sides. Find