Simplify: (b² - 49) (b + 7) + 343

Solution:

Given, (b² - 49) (b + 7) + 343

⇒ b²(b + 7) - 49(b + 7) + 343

= b³ + 7b² - 49b - 343 + 343

= b³ + 7b² - 49b

✦ Try This: Simplify: (x² + 64 ) (x + 8) - 512

Given, (x² + 64 ) (x + 8) - 512

⇒ x²(x + 8) + 64(x + 8) - 512

= x³ + 8x² + 64x + 512 - 512

= x³ + 8x² + 64x

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 9

NCERT Exemplar Class 8 Maths Chapter 7 Problem 84(x)

Simplify: (b² - 49) (b + 7) + 343

Summary:

Simplifying (b² - 49) (b + 7) + 343 we get, b³ + 7b² - 49b

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