factorise 2x²+x+15
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hey there is problem in your question correct question is 2x^2+x-15 then answer is
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no its tbe only question
i know but here was problem of sign minus
i have just correct that
and then answered that
the whole question is to factorise 2x³-3x²-17x+30
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2x^2+x+15=0
by completing square method
dividing the equation by coefficient of x^2 that is 2
x^2+x/2+15/2=0
x^2+x/2=-15/2
completing square
x^2+2*x/4+(1/4)^2=-15/2+(1/4)^2
x^2+2*x/4+1/16=-15/2+1/16
(x+1/4)^2=-15*8/2*8+1/16
(x+1/4)^2=-120+1/16
(x+1/4)^2=-119/16
(x+1/4)=root119/16
(x+1/4)=root119/4
x=1/4+root119/4 and x=1/4-root119/4
i m not sure if this is correct
hope it helps you
by completing square method
dividing the equation by coefficient of x^2 that is 2
x^2+x/2+15/2=0
x^2+x/2=-15/2
completing square
x^2+2*x/4+(1/4)^2=-15/2+(1/4)^2
x^2+2*x/4+1/16=-15/2+1/16
(x+1/4)^2=-15*8/2*8+1/16
(x+1/4)^2=-120+1/16
(x+1/4)^2=-119/16
(x+1/4)=root119/16
(x+1/4)=root119/4
x=1/4+root119/4 and x=1/4-root119/4
i m not sure if this is correct
hope it helps you
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