exam Maths Puzzle Numerical Ability

pg. 380 no. 60.

a^2(b-c)-16b^2(b-c)

I think it is (b-c)(a^2-16b^2).

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exam Other Question

Find the area of the triangle ABC.
Angle A=37.0 degrees, side b=13.8in and side c=5.8 in The length of a rectangle is 5 cm more than 4 times its width. If the area of the rectangle is 80 cm2, find the dimensions of the rectangle to the nearest thousandth.

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