Question

Can you slove any one question ​

Answer 1

Answer:

Step-by-step explanation:

I'm not sure how to solve the first one, but I'll try to simplify sqrt3-1/sqrt3+1. I simplified it and I got 2-sqrt3. Does that help?

For question 2, I got -0.251.

Answer 2

Answer:

1) $\frac{\sqrt{3}-1 }{\sqrt{3}+1}=\frac{(\sqrt{3}-1)^{2} }{(\sqrt{3}+1)(\sqrt{3}-1) }=\frac{4-2\sqrt{3} }{3-1}=\frac{4-2\sqrt{3} }{2}=2-\sqrt{3}$

but $\frac{\sqrt{3}-1 }{\sqrt{3}+1 }=a+b\sqrt{3}$

=> a = 2

    b = -1

2) $\frac{\sqrt{10}-\sqrt{15} }{2\sqrt{2} }=\frac{\sqrt{20}-\sqrt{30} }{4}=\frac{2\sqrt{5}-\sqrt{30} }{4}=-0.251$

Step-by-step explanation: