If they are the dimensions of a rectangle then the perimeter is: 9+3+9+3 = 24m
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It is 9m^2 - 9 = (3m + 3)*(3m - 3).
18m^2 - 12m + 2 = 2(9m^2 - 6m + 1) you can apply the formula (a - b)^2 = (a^2 - 2ab + b^2) or if you don't remmember it, continue to work: = 2(9m^2 - 3m - 3m + 1) = 2[(9m^2 - 3m) - (3m - 1)] = 2[3m(3m - 1) - (3m - 1)] = 2[(3m - 1)(3m - 1)] = 2(3m - 1)^2
3 meters. 9m2/3m Divide both sides by 1m 9m/3 Simplify 3m
9m - 6m = 21 Combine like terms: 3m = 21 Divide both sides by 3: m = 7
It is not possible to answer the question. There are three measures, but they cannot form a 2D shape - a triangle. If they are the lengths of sides of a solid figure, there is no information as to what shape that figure is - a cuboid or a parallelepiped.