Question

is equal to
$\frac{ \sqrt{112} - \sqrt{80} }{ \sqrt{20} - \sqrt{28} }$
(a) √2
(b) 2
(c) 4
(d) -2​

Answer 1

(√112 - √80)/(√20-√28) = -2

Step-by-step explanation:

(√112 - √80)/(√20 - √28)

=(√2 * 2 * 28-√2 * 2 * 20 )/(√20

= (2√28-2√20)/(√20 - √28)

-√28)

= 2(√28 - √20)/(√20 - √28)

= -2 (√20-√28 )/(√20 - √28)

= -2

(√112 - √80)/(√20-√28) = -2