Skyboy

1)An alloy of copper zinc has a mass of 4.9kg.when suspended in water.0.98kg of water was displaced by it.calculate the mass of zinc in the alloy if 2.5 and 19.6 are the specific gravity of the zinc and copper respectively 2) A steel ball of diameter 0.2m...

9 years ago

Prove that if the diffrence between the root of the equation ax^2+bx+c=0 is 1, then a=b^2-a^2/4c

9 years ago

Find the values of m and n such that x^4+6x^3+13x^2+mx+n , is a perfect square

9 years ago

If one root of the equation x^2-px+q=0 is the square of the other, show that p^3-q(3p+1)-q^2=0. Provided q is not equal to 1

9 years ago

Find the values of p and q wich make x^4+6x^3+13x^2+bx+c a perfect square

9 years ago

If x^3+3ax^2+bx+c is a perfect cube .prove that b^3=27c^2

9 years ago

Solve. 4x^2-3x+2/(x-1)(x+2)(x^2+1)

9 years ago

(x-1)(x^2+x+1)/(x^2+1)(3x^2+4x+5)

9 years ago

10x^2+x+9/x(2x^2+3)

9 years ago

1)Solve.(x+3)^2/(x^2-x+7)(x-2)

9 years ago

Sin@=x find the value of (1-x^2)^1/2

9 years ago

X^3-(x+y)^3

9 years ago

Factorise X^2-2xy-15y^2=0

9 years ago

A point A(4, k) and B(2, 4) subtend a right angle at the origin of the coordinate axes. Find the value of k.

9 years ago

That is 27i cube root

9 years ago