Question

Find the difference: square root of 20 - square root of 80

Answer 1

`-2√(5)`

Explanation:

`√(20) = √(10*2) = √(5 * 2 *2) = √(2^2 * 5) = 2√(5)   \\\\√(80) = √(20*4) = √(5*4 *4) = √(4^2 * 5) = 4√(5)   \\\\2√(5) - 4√(5) = -2√(5)`