Let R = {(3, 3), (6, 6), (9, 9), (12, 12), (6, 12), (3, 9), (3, 12), (3, 6) be a relation on the set A = {3, 6, 9, 12}. The relation is
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9. Gagan is a builder who bought two plots of land for construction of buildings .The area of
the first plot is 4x2 + 12x +9 m2
. Area of the second plot is 4x2 +8x + 3 .
(i) He wants to put a fence around these plots till the construction starts . Which
mathematical concept will he use ?
(a) surface area (b) factorization only
(c) volume and factorization (d) factorization and perimeter
(ii) The coefficient of x2 in both the polynomials is
(a) 9 (b) 12 (c) 3 (d) 4
(iii) The length and breadth of the first plot are
(a) (2x – 3) and (2x – 3) (c) (2x + 3) and (2x + 3)
(c) (2x -3) and (x + 3) (d) (x+3 ) and (x-3)
(iv) Which method of factorization would be used to factorize 4x2 + 8x + 3
(a) grouping (b) taking out common factor (c) splitting the middle term
(d) using suitable identity9. Gagan is a builder who bought two plots of land for construction of buildings .The area of
the first plot is 4x2 + 12x +9 m2
. Area of the second plot is 4x2 +8x + 3 .
(i) He wants to put a fence around these plots till the construction starts . Which
mathematical concept will he use ?
(a) surface area (b) factorization only
(c) volume and factorization (d) factorization and perimeter
(ii) The coefficient of x2 in both the polynomials is
(a) 9 (b) 12 (c) 3 (d) 4
(iii) The length and breadth of the first plot are
(a) (2x – 3) and (2x – 3) (c) (2x + 3) and (2x + 3)
(c) (2x -3) and (x + 3) (d) (x+3 ) and (x-3)
(iv) Which method of factorization would be used to factorize 4x2 + 8x + 3
(a) grouping (b) taking out common factor (c) splitting the middle term
(d) using suitable identity