Question

plz answer this question​

Answer 1

Answer:

√80-√112 / √45-√63= -55.633...

Answer 2

Step-by-step explanation:

$\begin{array}{ll} 80=2 \times 2 \times & 2 \times 2 \times 5=2^{4} \times 5 \\ \sqrt{80}=2^{2} \sqrt{5}=4 \sqrt{5} & \\ 112=2 \times & 2 \times 2 \times 2 \times 7=2^{4} \times 7 \\ \sqrt{112}=2^{2} \sqrt{7}=4 \sqrt{7} & \\ 45=3 \times 3 \times 5 & \\ \sqrt{45}=3 \sqrt{5} & \\ 63=3 \times 3 \times 7 & \\ \sqrt{63}=3 \sqrt{7} & \\ \text{ Expression becomes} \frac{\sqrt{80}-\sqrt{112}}{\sqrt{45}-\sqrt{63}}= \\ \frac{4 \sqrt{5}-4 \sqrt{7} }{3 \sqrt{5} - 3 \sqrt{7} }& =\frac{4(\sqrt{5}-\sqrt{7})}{3(\sqrt{5}-\sqrt{7})}=\frac{4}{3} \end{array}$