Question

9. Verify: (i) x + y2 = (x + y) (x2 - xy + y2) (ii) x-y* = (x - y) (x2 + xy + y2)
10. Factorise each of the following:
(i) 27y3 + 125z
(ii) 64m3 - 343n3
[Hint : See Question 9.]
11. Factorise : 27x + y + z2 - 9xyz
1
12. Verify that x? + y2 +z - 3xyz = + (x + y + z)[(- y)2 + (y – z)? + (z - x)?]
13. If x + y + z = 0, show that x + y + z = 3xyz.
14. Without actually calculating the cubes, find the value of each of the following:
(1) (-12) + (7) + (5)3
(ii) (28)3 + (-15) + (-13)
15. Give possible expressions for the length and breadth of each of the following
rectangles, in which their areas are given:
(¡)Area : 25a -35a + 12
(¡¡)Area : 35y2 + 13y-12
​

Answer 1

Answer:

158xyz

Step-by-step explanation:

is incorrect or correct