Answer:
His reasoning is not correct because √50 = √2 × √25 and not 2√25
b) 7.1 to the nearest tenth
Step-by-step explanation:
Using the laws of surds, we know that
√a × √b = √ab
and
a√b = √a² × √b
As such,
√50 = √2 × √25 (since 2 × 25 = 50)
= √2 × 5
= 5√2
= 5 × 1.414 where √2 = 1.414
= 7.07
≈ 7.1 to the nearest tenth
