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Find the Following Product: (3x + 5) (3x + 11) - Mathematics

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ConceptConcept of Identity

Question

Find the following product: (3x + 5) (3x + 11)

Solution

Here, we will use the identity‚Äč \[\left( x + a \right)\left( x + b \right) = x^2 + \left( a + b \right)x + ab\].

\[\left( 3x + 5 \right)\left( 3x + 11 \right)\]

\[ = \left( 3x \right)^2 + \left( 5 + 11 \right)\left( 3x \right) + 5 \times 11\]

\[ = 9 x^2 + 48x + 55\]

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APPEARS IN

 RD Sharma Solution for Mathematics for Class 8 by R D Sharma (2019-2020 Session) (2017 to Current)
Chapter 6: Algebraic Expressions and Identities
Ex. 6.7 | Q: 1.07 | Page no. 47

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Solution Find the Following Product: (3x + 5) (3x + 11) Concept: Concept of Identity.
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