Question

root45-3root20+4root5​

Answer 1

$\star\:\:\:\sf\large\underline\blue{Question:-}$

• Evaluate $\sf \sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5}$

$\star\:\:\:\sf\large\underline\blue{Solution:-}$

$\sf \sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5}$

$\sf = 3 \sqrt{5} - 3 \times 2 \sqrt{5} + 4 \sqrt{5}$

$\sf = 3 \sqrt{5} - 6 \sqrt{5} + 4 \sqrt{5}$

$\sf = \pm\sqrt{5}$

$\star\:\:\:\sf\large\underline\blue{Answer:-}$

• The required answer is $\sf = \pm\sqrt{5}$

Answer 2

Answer:

hey watch the above pic for ur answer of the question.

hope it helps you .