Chapter 4
Exploring Algebraic Identities
CBSE Class 9
Mathematics Solutions
Educart Mathematics class Class 9 NCERT Exemplar cover
Question:

Find possible expressions for the length, breadth, and heights of each of the following cuboids whose volumes are given by the following expressions in cubic units.
(A) 6a224b26a^2 - 24b^2
(B) 3ps215ps+12p3ps^2 - 15ps + 12p

Answer: Verified

(A)6a224b2=6(a24b2)=6(a2b)(a+2b)\text{(A)}\quad6a^2-24b^2=6(a^2-4b^2)=6(a-2b)(a+2b)

Possible dimensions: Length = 6,

Breadth = (a - 2b), Height = (a + 2b)

(B)3ps215ps+12p=3p(s25s+4)\text{(B)} \quad 3ps^2 - 15ps + 12p = 3p(s^2 - 5s + 4)

=3p(s1)(s4)= 3p(s - 1)(s - 4)

Possible dimensions: Length=3pLength=3p,

Breadth=(s1)\text{Breadth} = (s - 1), Height=(s4)\text{Height} = (s - 4)

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