Okay sweet I got : 4x^3-480=0 4x^3=480 x^3=120 x= 3 root 120 = 4.9... Thanks alot btw, but how do I choose what to multiply by if this was another q in an exam with different multiples...? Thanks though!!
well if you get summit similar try multiplying by enough to turn the biggest negative into a 0, so like if you have 2x^2+5x^-3=0 then you'd try multiplying by x^3 to turn the -3 into a 0
Okay sweet I got : 4x^3-480=0 4x^3=480 x^3=120 x= 3 root 120 = 4.9... Thanks alot btw, but how do I choose what to multiply by if this was another q in an exam with different multiples...? Thanks though!!
Well it's better to get rid of the fractions or negative power (by this I mean x21​ or x−2). So multiply by whatever you need to get rid of the negative power.