When x is the value of X, the function y = 3x + 4 radical (1-x2) takes the maximum value. Don't do it by derivation

Let x = SINB, O

Y = (3x ^ 2-x √ x + 5 √ X-9) / √ x derivation

y=(3x^2-x√x+5√x-9)/√x
=3x^(3/2)-x+5-9x^(-1/2)
y'=9/2x^(1/2)-1+9/2x^(-3/2)
=9/2x^(1/2)+9/2x^(-3/2) -1

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