### math 9TH UNIT 6 Algebraic manipulation-1 1.    The meaning for the abbreviation HCF and LCM is? a) Highest common factor and least common multiple b) Highest common factor and least common multiplication c) Highest common fragment and least common multiple d) Highest common factor and least common factor 2.    If two or more algebraic expressions are given then their common factor of highest power is called? a) LCM b) HCF c) None d) Divider 3.    If an algebraic expression p(x) is exactly divisible by two or more expressions then p(x) is called? a) LCM b) Common multiple c) Multiply d) multiple 4.    We can find HCF by? a) Both are false b) Both are true c) Factorization d) Division 5.    LCM x HCF = ? a) p(x) x q(x) b) HCF c) Both LCM and HCF d) LCM 6.    We define a square root of a given expression p(x) as another expression q(x) as? a) q(x) - q(x) = p(x) b) None c) q(x) q(x) = p(x) d) q(x) q(x) = q2(x) 7. The square root of the expression 4x2-12x+9 =? a) (3x-2)2 b) (2x-3) c) (3x-2) d) (2x-3)2 8. HCF of p3q - pq3 and p5q2 - pq5 =? a) p2q2(p-q) b) pq(pq) c) pq(p3-q3) d) pq(p2 - q2) 9. HCF of 5x2y2 and 20 x3y3 is? a) 20 x3y3 b) 100x5y5 c) 5xy d) 5x2y2 10. HCF of a2-b2 and a3-b3 is? a) a2-ab+b2 b) (a+b) c) (a2+ab+b2) d) (a-b) 11. LCM of 15x2, 45xy and 30xyz is? a) 15x2yz b) 90x2yz c) 15xyz d) 90xyz 12. The square root of x4+1/x4+2=? a) (x+1/x) b) (x2+1/x2) c) (x2-1/x2) d) (x-1/x) 13. What should be added to complete the square of x4+64? a) 4x2 b) 8x2 c) -8x2 d) 16x2

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