15. Simplify the following expressions :

i) (✓3+✓7)²

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15. Simplify the following expressions :

i) (✓3+✓7)²

15. Simplify the following expressions :

i) (✓3+✓7)²

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Step-by-step explanation:## (√3+√7)²

## =(√3)²+(√7)²+2*√3*√7

## =3+7+2√21

## = 10+2√21

## =2(5+√21)

Step-by-step explanation:## => Use formula (a+b)²=a²+2ab+b²

## =(✓3+✓7)²

## =(√3)²+2×√3×√7+(√7)²

## =3+7+2√21

## =10+2√21