Question

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 identity​

Answer 1

o my god it's very big

Answer 2

See the solution.

Hope it helps!