Question

simplify (3+underroot 2) and (3- under root 2)​

Answer 1

Step-by-step explanation:

• Use Difference of Squares: $a^2-b^2=(a+b)(a-b)$

$3^2-\sqrt{2}^2$

• Simplify $3^2$ to $9$.

$9-\sqrt{2}^2$

• Use this rule: $\sqrt{x}^2=x$

$9-2$

• Simplify.

$7$