exam Maths Puzzle Numerical Ability

I need help with solving x for the problem -3x^(1/2)+(4x)^(1/2)= -1
Can you please show me how you solve it? Thanks for your help!

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exam Other Question

An owner of a fruit orchard hirees a crew of workers to prune at least 25 of his 50 trees. Each newer tree requires one hour pruning, while each older tree requires one and a half Please help me with this problem!
log5 16-log5 2t=log5 2