Use the Product (A + B) (A – B) = A2 – B2 to Evaluate: 33 X 27

Use the product (a + b) (a – b) = a² – b² to evaluate:
33 x 27

Sum

33 x 27 = (30+3) (30−3)

= (30)² − (3)²

= 900 − 9

= 891

shaalaa.com

Product of Sum and Difference of Two Terms

Is there an error in this question or solution?

Chapter 12: Identities - Exercise 12 (A) [Page 150]

Chapter 12 Identities
Exercise 12 (A) | Q 4.2 | Page 150

Use the product (a + b) (a – b) = a² – b² to evaluate:
103 x 97

Use the product (a + b) (a – b) = a² – b² to evaluate:
9.8 x 10.2

Use the product (a + b) (a – b) = a² – b² to evaluate:
4.6 x 5.4

Evaluate: (6 – xy) (6 + xy)

Evaluate : `("a"/(2"b")+(2"b")/"a")("a"/(2"b")-(2"b")/"a")`

Evaluate: (2a + 3) (2a − 3) (4a² + 9)

Evaluate : (a + bc) (a − bc) (a² + b²c²)

Evaluate : (9a − 7b) (3a − b)

Evaluate: (m + 3) (m − 3) (m² + 9)

Evaluate: (3x + 4y) (3x − 4y) (9x² + 16y²)