Q 5: Divide [(5a)^{3}-(6b)^{3}] by (5a-6b). 25a^{2}+30ab+36b^{2} 25a^{2}-30ab+36b^{2} 25a^{3}+30ab+36b^{3} 25a^{3}+30ab+36b^{2}

Q 6: Find the product of (x-3)(x-5)(x+7). x^{3}-x^{2}-41x+105 None of these x^{3}-x^{2}-41x+105 x^{3}-x^{2}-41x+105

Q 7: If x + 1/x = 5, find the value of x^{2}+1/x^{2} and x^{4}+1/x^{4}. 567 547 527 537

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

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