Question

(a-3b) (a + 2b)
pls answer this as fast as possible

Answer 1

Answer:

a -3b ) (a + 2b)

a (a + 2b) - 3b (a + 2b)

a2 + 2ab -3ab - 6 b2

a2 - 6b2 - ab

Answer 2

Question:-

(a-3b) (a + 2b)

a(a+2b) -3b(a+2b)

= a²+2ab-3ab-6b²

= a²-6b²-ab

Answer:-

a²-6b²-ab

Know More:-

(a+b) ²= a²+b²+2ab

(a-b) ² = a²+b²-2ab

a²-b²=(a+b) (a-b)

(a+b) ²-(a-b) ²=4ab

(a+b) ²+(a-b) ²=2(a²+b²)

a²+b²=(a+b) ²-2ab

(a+b) ³=a³+3a²b+3ab²+b³

(a-b) ³=a³-b³-3ab(a-b)

a³+b³=(a+b) (a²-ab+b²)

a³-b³=(a+b) (a²+ab+b²)

(a+b+c) ²=a²+b²+c²+2ab+2bc+2ca

a³+b³+c³-3abc=(a+b+c) (a²+b²+c²-ab-bc-ca)