Question

simplify 2*cube root 40 + 3*cube root 625 + 4*cube root 320​

Answer 1

$2 \sqrt[3]{40} + 3 \sqrt[3]{625 } + 4 \sqrt[3]{320} =$
we can write 40=2*2* 2*5=2³*5 ...
∛40=∛(2³*5)= ∛2³*∛5=2∛5 625= 25²=(5²)² ∛625=∛5⁴=5∛5