Question

Q- Simplify:
+  2 √5− √3 +  1 2− √5√5 + √3 √5 − √3 +  √5 − √3 √5 + √3​

Answer 1

Answer:

step 1 ) rationalise both of them you will get 8+2√15/2 + 8-2√15/2

step 2) they are like fractions , now add them you will get 8+8+2√15-2√15/2

step 3) solve them you will get 16/2 which is equal to 8

therefore correct answer is 8

imp formulas : (a+b)^2 = a2+b2+2ab

(a-b)^2 = a2+b2-2ab