Simplify: (2x - 4y + 7)(2x + 4y + 7) - Mathematics

Simplify:
(2x - 4y + 7)(2x + 4y + 7)

बेरीज

(2x - 4y + 7)(2x + 4y + 7)
= (2x + 7 - 4y)(2x + 7 + 4y)
= (2x + 7)² - (4y)²
= 4x²+ 2(2x)(7) + 7² - 16y²
= 4x² - 16y² + 28x + 49.

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पाठ 4: Expansions - Exercise 4.2

पाठ 4 Expansions
Exercise 4.2 | Q 24.13

Use suitable identity to find the following product:

(3x + 4) (3x – 5)

Evaluate the following using identities:

`(a^2b - b^2a)^2`

Find the value of 4x² + y² + 25z² + 4xy − 10yz − 20zx when x = 4, y = 3 and z = 2.

Evaluate of the following:

(598)³

If a + b + c = 9 and ab +bc + ca = 26, find the value of a³ + b³+ c³ − 3abc

If a − b = 5 and ab = 12, find the value of a² + b²

The product (a + b) (a − b) (a² − ab + b²) (a² + ab + b²) is equal to

If x + y = `7/2 "and xy" =5/2`; find: x - y and x² - y²

Simplify:

`("a" - 1/"a")^2 + ("a" + 1/"a")^2`

Expand the following:

(3a – 5b – c)²