Mathematics
OraliaLightfoot219
7

solve 2x2 – 5x 1 = 3 for x.

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(1) Answers
oakley0123

2x^2-5x+1=3 2x^2= a -5x=b 1=c the rule is: ax^2+bx+c= 0 therefore, we have to make the equation equals to zero: 2x^2-5x+1-3=0 2x^2-5x-2= 0 the rule here is: b^2-ac: delta= 25-16=9 then you square the delta: =√delta= 3 there are two ways to get x, either: (-b-delta)÷2a x...(1)= (5-3)÷4= 1/2 or, (b+delta)÷2a x...(2)= (5+3)÷4= 2 hope it makes sense.

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