Question : 8

For any two integers $xandy$, which of the following suggests that operation of addition is commutative ?

(a)$x+y=y+x$

(b)$x+y>x$

(c)$x-y=y-x$

(d) $xy=yx$

Q.

Question : 8

For any two integers $xandy$, which of the following suggests that operation of addition is commutative ?

(a)$x+y=y+x$

(b)$x+y>x$

(c)$x-y=y-x$

(d) $xy=yx$

Q. The commutative law states that for any two sets $X\&Y;X\cup Y=Y\cup X.$

Q. Question 9
Verify:
$\left(i\right)x^3+y^3=(x+y)(x^2-xy+y^2)\left(ii\right)x^3-y^3=(x-y)(x^2+xy+y^2)$

Q. For any two real numbers $x,y$ such that $xy\le 0,$ the value of $|x-y|=|x|+|y|.$

Q.

Question 4 (a)

Identify terms which contain x and give the coefficient of x.

(i) $y^{2}x+y$

(ii) $13y^2-8yx$

(iii) x + y + 2

(iv) 5 + z + zx

(v) 1 + x + xy

(vi) $12x{y}^2+25$

(vii)$7x+x{y}^2$