Question

Which expression is equivalent to (√2 - 3√5)(√2 - √7)

a. 2 - √14 - 3√10 + 3√35
b. 2 + √14 + 3√10 - 3√35
c. 2 - √7 + 3√10 - 3√35
d. 2 + √7 - 3√10 - 3√35

Thanks for those who answer! Please show the steps to your answer!

Answer 1

I know -3√5*(-√7) = + 3√35
√2 * (- √17) = -√14
-3√5*√2 = -3√10
The only part I'm stuck on it how to get the

Answer 2

2 in front of the equations

Answer 3

√2*√2=?