Question

I need help with number 5 please

Answer 1

Answer:

4$\sqrt{14}$

Step-by-step explanation:

Using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$

Simplify radicals, that is

$\sqrt{56}$

= $\sqrt{4(14)}$

= $\sqrt{4}$ × $\sqrt{14}$ = 2$\sqrt{14}$

$\sqrt{126}$

= $\sqrt{9(14)}$

= $\sqrt{9}$ × $\sqrt{14}$ = 3$\sqrt{14}$

Then

$\sqrt{56}$ - $\sqrt{14}$ + $\sqrt{126}$

= 2$\sqrt{14}$ - $\sqrt{14}$ + 3$\sqrt{14}$

= 4$\sqrt{14}$

Answer 2

The answer is the second one 4 √14