Answer:
Step-by-step explanation:
11)
√(343 x^4)=√(7×7×7×x^4)=7√7 x^2
Answer: 7√ 7x^2
7 √ 7= 18.52x^2
√ 343x^4 = √ 7×49x^4
=7 √ 7x^4×1/2
=7 √ 7x^2
