Question

Factorise : a) 63 x² - 112y²

Answer 1

Answer:

7 ( 3x + 4y) (3x - 4y)

explanation ;

63x² - 112y²

Take out common factor 7:

= 7(9x² - 16y²)

Write in perfect squares:

= 7 [ (3x)² - (4y)² ]

Apply a² - b² = (a + b)(a - b):

= 7 ( 3x + 4y) (3x - 4y)

Answer: 7 ( 3x + 4y) (3x - 4y)

hope it helps you(●'◡'●)