Question

Eaxpand Eaxpand (2a+3b-4c)2​

Answer 1

Step-by-step explanation:

GIVEN:

Eaxpand Eaxpand (2a+3b-4c)2

to find :

(2a+3b-4c)2

solution:

• (2a + 3b + 4c)²

• formula which is

• (a+b+c)² = a² + b² + c²+2 (ab + bc + cb)

then,

• (2a)² + (3b)² + ( 4c)² + 2 { ( 2a.3b + 3b.4c + 4c.2a) }

• = 4a² + 9b² + 16c² + 2 {(6ab + 12bc + 8ca)}

Answer 2

Answer:

4a2+ 9b2 + 16c2+ 12ab-24bc-16ca

Step-by-step explanation:

use identities

(x+y+z)2 = x2+y2+z2+2xy+2yz+2zx