Question

8корень из5x+3корень из80x-7корень из0,05x

Answer 1

$8sqrt {5x}+3sqrt {80x}-7sqrt {0,05x}=8sqrt {5x}+3sqrt {16cdot5x}-7sqrt {0,01cdot5x}=8sqrt {5x}+3cdot4sqrt {5x}-7cdot0,1sqrt {5x}=8sqrt {5x}+12sqrt {5x}-0,7sqrt {5x}=19,3sqrt {5x}$