Question

3. Find the following products :
(a) (3x) (2x² + 6x – 7)​

Answer 1

The required product = 6x³ + 18x² - 21x

Given :

The expressions (3x) and (2x² + 6x – 7)

To find :

The product

Solution :

Step 1 of 2 :

Write down the given expressions

The given expressions are

(3x) and (2x² + 6x – 7)

Step 2 of 2 :

Find the product

The required product

= ( 3x) × (2x² + 6x – 7)

$\sf =(3x) \times (2 {x}^{2} ) + (3x) \times (6x) - (3x) \times 7$

$\sf = 6 {x}^{3} + 18 {x}^{2} - 21x$

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