" (a) "4a^(2)-9(b+c)^(2)

Find the product (2a + 3b - 4c) (4a ^(2) + 9b ^(2) + 16 c ^(2) - 6 ab + 12 bc +8 ca)

Factorise : (i) 4a^(2)+9b^(2)+16c^(2)+12ab-24bc-16ca (ii) (4)/(9)x^(2)+(9)/(16)y^(2)+(16)/(25)z^(2)-xy-(6)/(5)yz+(16)/(15)zx (iii) 2x^(2)+y^(2)+8z^(2)-2sqrt(2)xy+4sqrt(2)yz-8xz

Factorise: 4(2a - b+c) ^(2) - 9 ( a+b- c) ^(2)

Find the square root of : 4 a ^(2) + 9b ^(2) + c ^(2) - 12 ab + 6 bc - 4 ac

Factorise : 4a^(2)+9b^(2)+16c^(2)+12ab-24bc-16ca

Simplify : (2a+3b+4c) ( 4a^(2) + 9b^(2) + 16c^(2) -6ab - 12bc - 8ca )

Find the product: (2a-3b-2c)(4a^(2)+9b^(2)+4c^(2)+6ab-6bc+4ca)

Find the product (2a-3b-2c)(4a^(2)+9b^(2)+4c^(2)+6ab-6bc+4ca) .

Find the product (2a-3b-2c)(4a^(2)+9b^(2)+4c^(2)+6ab-6bc+4ca) .

Statement I: The points (a,0),(0,b) and (1,1) will be collinear if 1/a+1/b=1 Statement II: If 4a^(2)+9b^(2)-c^(2)+12ab=0 , then the family of lines ax+by+c=0 is either concurrent at (2,3) or at (-2,-3). Then which of the followng is true