Question

1)factorise 64x^3-125

2) evaluate using identity -28^3+9^3+19^3

3)if p=2-a then prove that a^3 + 6ap+p^3-8

4) factories : (x-2y)^3 + (2y-3z)^3 + (3z-x)^3

5) factories: a^2 - b^2 + 2bc - c^2

6) the perpendicular distance of point from x axis is 3 units and the perpendicular distance from y axis is 2 units. write the co-ordinate of the point if it lies in
(i) 1st quadrant
(ii)2nd quadrant​

Answer 1

hope it helps

64x^3-125

=(4x)^3-(5)3

=(4x-5){(4x)^2+4x×5+(5)^2}

=(4x-5)(16x^2+20x+25)