Question

answer fast and correct ok ok​

Answer 1

1. (a) 10

√20 × √5

= √(5 × 4) × √5

= 2√5 × √5

= 2 × (√5 × √5)

= 2 × 5

= 10

$\rule{200}2$

2. (b) 56^1/2

$\sf{7^\frac{1}{2} \times 8^\frac{1}{2} }\\\\\sf{=(7\times8)^\frac{1}{2} }$

As aⁿ × bⁿ = (ab)ⁿ

$\sf{=56^\frac{1}{2} }$

Answer 2

$\huge\bf\pink{10 is the answer }$

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