Introducing your new favourite teacher - Teachoo Black, at only βΉ83 per month
Last updated at Dec. 26, 2018 by Teachoo
Example 6 Factorise 49π^2 β 36 49π^2 β 36 = γ(7π)γ^2 β6^2 Using π^2βπ^2 = (π+π) (πβπ) Here π=7π, π=6 = (ππ+π) (ππ βπ)