Question

if 3x * ( x +5 ) = 24 then x = ?​

Answer 1

Answer:

x = (-5±√57)/2

Explanation:

3x(x+5)=24

Divide both sides of the equation by 3 , we get

=> x(x+5)=8

=> x²+5x=8

=> x²+2*x*(5/2)=8

=> x²+2*x*(5/2)+(5/2)²=8+(5/2)²

=> (x+5/2)²=8+25/4

=>(x+5/2)²=(32+25)/4

=> (x+5/2)²=57/4

=> x+5/2= ±√(57/4)

=> x+5/2=±√(57)/2

=> x = -5/2±√(57)/2

=> x = (-5±√57)/2

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