Crosswords1 min ago
completing the square
I can do some of them, but on mymaths, there are questions that involve ending up with fractions, but we haven't ben taught how to do these, and the online tutorial doesn't include any that do . . . . can anyone help?
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There's no difference between the methods for completing the square when the numbers turn out to be fractions and when they don't. So as long as you can manipulate fractions you should be OK.
Just remember that sqrt(a/b)=sqrt(a)/sqrt(b) and sqrt(a x b)=sqrt(a) x sqrt(b).
so sqrt(9/4)=sqrt(9)/sqrt(4)=+/-3/2 etc.
Also squaring fractions (a/b)^2=a^2/b^2 etc
There's no difference between the methods for completing the square when the numbers turn out to be fractions and when they don't. So as long as you can manipulate fractions you should be OK.
Just remember that sqrt(a/b)=sqrt(a)/sqrt(b) and sqrt(a x b)=sqrt(a) x sqrt(b).
so sqrt(9/4)=sqrt(9)/sqrt(4)=+/-3/2 etc.
Also squaring fractions (a/b)^2=a^2/b^2 etc