Posted by Ulyessus on .
My teacher said
If x-2(square root xy)=9-4(square root 2)
so since there are two square roots
-2(square root xy) equals -4(square root 2)
How is this possible, could the values be different and they are not equal.
Year 11 maths -
your teacher is dead wrong.
sqrt25 is not equal to sqrt196, ever.
Point this out to your teacher.