15. Give possible expressions for the length and breadth of each of the following
rectangles, in which their areas are given:
Area : 250-35a +12
Area : 35y2 + 13y-12
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15. Give possible expressions for the length and breadth of each of the following
rectangles, in which their areas are given:
Area : 250-35a +12
Area : 35y2 + 13y-12
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Answer:
25a²-35a+12
= 25a² -20a -15a +12
= 5a(5a-4) -3(5a-4)
= (5a-4)(5a-3)
length= (5a-4) or, (5a-3)
breadth= (5a-3) or, (5a-4)
35 y² +13y -12
= 35y² +28y -15y -12
= 7y(5y +4) -3(5y +4)
= (7y-3)(5y+4)
length= (7y-3 ) or, (5y+4)
breadth= (5y+4) or, (7y-3)