How to factorise the difference of perfect squares. for the g on the top and j on the top

Question

asked May 8, 2021 38.0k views

1 Answer

Dmitry Kochkin · Answer 1 · 2021-05-12T09:06:25+0000

Answer:

see explanation

Explanation:

A difference of two squares is factored as

a² - b² = (a - b)(a + b)

(g)

1 - 81y²

= 1² - (9y)²

= (1 - 9y)(1 + 9y)

(j)

64x² - 25y²

= (8x)² - (5y)²

= (8x - 5y)(8x + 5y)