Question

cu cât este egal 2√45?

Answer 1

$\it 2\sqrt{45}= 2\sqrt{9\cdot5}=2\cdot3\sqrt5=6\sqrt5$

Answer 2

$2 \sqrt{45} = 2 \sqrt{ {3}^{2} \times 5 } = 2 \sqrt{ {3}^{2} } \sqrt{5} = 2 \times 3 \sqrt{5} = (2 \times 3) \sqrt{5} = 6 \sqrt{5}$