Question

Short Answer Questions (2marks each)
7. Factorise x3 - X.
8. Factorise y2 -10y +21
9.Simplify and find the value of,
x(x - 2) + 3 for x= (-1)
10.Find the sum of 5xy2 - 2 and 4 + xy2
11. Expand using identity ( x + 2p2)2
12. Using identity find the value of 297 x 303
13.Divide : 10x2 - X-3
(2x +1)​

Answer 1

answer 7 :)

hope this answer helps u :)

Answer 2

Answer:

7-x3-x

let common x

x(x2-1)

x(x2-12)

we know that--(a2-b2)=(a+b)(a-b)

x(x-1)(x+1)

now x=0

x=1

x=-1

8-y2-10y+21

y2-(7+3)y+21

y2-7y-3y+21

y(y-7)-3(y-7)

let common (y-7)

(y-7)(y-3)

y-7=0

y=7

y-3=0

y=3