exam Maths Puzzle Numerical Ability

(3y^2+1)(3y^2-1) Find the product.

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exam Other Question

What is the equation of a line with the points (-4,0) and (0,-3)?

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Please help me find the measures of the sides of the triangle: The ratio of the measures of three sides of a triangle are 1/2:1/3:1/5, and its perimeter is 6.2 centimeters.