Question

Give possible expressions for length and breadth of the rectangle whose
area is
12x2 - 35x + 25
a) (5x-4) and (3x + 5)
b) (3x - 5) and (5x-4)
c) (4x - 5) and (3x - 5)
d) None of the above​

Answer 1

Step-by-step explanation:

(i) Let us first factorize the given expression 25a

2

−35a+12 as shown below:

25a

2

−35a+12

=25a

2

−15a−20a+12

=5a(5a−3)−4(5a−3)

=(5a−4)(5a−3)

Therefore, the area of the rectangle is (5a−4)(5a−3) and we also know that the area of the rectangle is A=length×breadth.

Hence, the length and breadth can both be (5a−4) or (5a−3).

(ii) Let us first factorize the given expression 24x

2

−15x as shown below:

24x

2

−15x

=x(24x−15)

Therefore, the area of the rectangle is x(24x−15) and we also know that the area of the rectangle is A=length×breadth.

Hence, the length and breadth can both be x or (24x−15).

Answer 2

${\huge{\fcolorbox{black}{WHITE}{♡HAN JU HUI♡}}}$