Question

Without using a calculator simplify (a) √3×√3 (b) 3√6 × 4√6 (c) (2√7)² (d) ²√5 × ²√5 × ²√5

Answer 1

Surds

√3×√3 =3

3√6 × 4√6 =12 × 6= 72

(2√7)²=(2√7)(2√7)=4+2√7+2√7+7=4√7 +11

√5 ×√5 ×√5 =5√5