Which one of the following is false
(a) The square root of 9 is 3 or -3.
(b) `sqrt9=3`
(c) `-sqrt9=- 3`
(d) `sqrt9= pm 3`

Find the square root of 9 -4sqrt5

Which one of the following are irrational numbers ? (i) sqrt(2+sqrt3) , (ii) sqrt(4+sqrt25) , (iii) root3(5+sqrt7) , (iv) sqrt(8-root3(8))

The length of the chord of the parabola y^2=x which is bisected at the point (2, 1) is (a) 2sqrt(3) (b) 4sqrt(3) (c) 3sqrt(2) (d) 2sqrt(5)

Which of the following is not the solution of (log)_3(x^2-2)<(log)_3(3/2|x|-1) is (a) (sqrt(2),2) (b) (-2,-sqrt(2)) (c) (-sqrt(2),2 (d) none of these

Two medians drawn from the acute angles of a right angled triangle intersect at an angle pi/6. If the length of the hypotenuse of the triangle is 3 units, then the area of the triangle (in sq. units) is (a) sqrt3 (b) 3 (c) sqrt2 (d) 9

Which of the following is equal to root(3)(-1) a. (sqrt(3)+sqrt(-1))/2 b. (-sqrt(3)+sqrt(-1))/(sqrt(-4)) c. (sqrt(3)-sqrt(-1))/(sqrt(-4)) d. -sqrt(-1)

Which term of the following sequences: (a) 2,2sqrt4,4.......... is 128 ? (b) sqrt3,3,3sqrt3 ,............. is 729 ? (c) 1/3,1/9,1/(27),......." is " 1/19683 ?

Rewrite the following polynimials in standard form. x- 9+ sqrt(7) x^(3) + 6x^(2)