91Ó°ÊÓ

Q 143.

Page 1055

Explain why $\sqrt{x^4}=x^2$ Then explain why$\sqrt{x^{16}}=x^8$.

Q 144.

Page 1055

Explain why $7+\sqrt{9}$ is not equal to $\sqrt{7+9}$.

Q. 145

Page 1063

In the following exercise, simplify:$8\sqrt{2}-5\sqrt{2}$

Q. 146

Page 1063

In the following exercise, simplify:$7\sqrt{2}-3\sqrt{2}$

Q. 147

Page 1063

In the following exercise, simplify:$3\sqrt{5}+6\sqrt{5}$

Q. 148

Page 1063

In the following exercise, simplify:$4\sqrt{5}+8\sqrt{5}$

Q. 149

Page 1063

In the following exercise, simplify:$9\sqrt{7}-10\sqrt{7}$

Q 15.

Page 1041

Simplify Expressions with Square Roots:

$\sqrt{-9}$

Q. 150

Page 1063

In the following exercise, simplify:$11\sqrt{7}-12\sqrt{7}$

Q. 151

Page 1063

In the following exercise, simplify:$7\sqrt{y}+2\sqrt{y}$