exam Maths Puzzle Numerical Ability

sketch the graph 1/[x^2-1]

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exam Other Question

A rectangular solid has a base with length 10 cm and width 9 cm. If the volume of the solid is 270 cm3, find the height of the solid. (Hint: The volume of a rectangular solid is given by V = LWH.)

Confuse on cm3...need help in solving...thanks. find the product

(9x-8)^2
a. 81x^2+64
b. 9x^2+64
c. 9x^2-144x+64
d. 81x^2-144x+64