Q 2: Expand (2x+2y+z)^{2}. 4x^{2}+4y^{2}+z^{2}+8xy+2yz+4xz None of these 4x^{2}+4y^{2}+z^{2}+8xy+4yz+4xz 4x^{2}+4y^{2}+z^{2}+4xy+4yz+4xz

Q 3: If a+b = 8 and ab = 15, find the value of a^{3}+b^{3}. 152 153 157 159

Q 4: Find the product of (2x+2y+2z) (4x^{2}+4y^{2}+4z^{2}-4xy-4yz-4xz). None of these 8x^{3}+8y^{3}+z^{3}-12xyz 8x^{3}+8y^{3}-z^{3}-24xyz 8x^{3}+8y^{3}+z^{3}-24xyz

Q 5: Divide [(3a)^{3} + (3b)^{3}] by (3a+3b). 9a^{2}+9ab+9b^{2} None of these 9a^{2}-9ab+9b^{2} 9a^{2}-9ab-9b^{2}