Evaluate: (A2 + 5) (A2 − 3)

Evaluate: (a² + 5) (a² − 3)

Sum

(a² + 5) (a² − 3) = a² (a² − 3) + 5 (a² − 3)

= a⁴− 3a² + 5a² − 15

= a⁴ + 2a² − 15

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Product of Sum and Difference of Two Terms

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Chapter 12: Identities - Exercise 12 (D) [Page 155]

Chapter 12 Identities
Exercise 12 (D) | Q 1.5 | Page 155

Evaluate : (3−2x) (3+2x) (9+4x²)

Use the product (a + b) (a – b) = a² – b² to evaluate:
21 x 19

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

Evaluate : `(3"x"-1/(2"y"))(3"x"+1/(2"y"))`

Evaluate : (5x + 8y) (3x + 5y)

Evaluate: (4x² − 5y²) (4x² + 5y²)

Evaluate: (m + 3) (m − 3) (m² + 9)

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