Question

find HCF of 9x^3-49y^2 and (3x+7y)^2-84x^2​

Answer 1

Answer:

(3x+7y)^2-84x^2 it is the right answer

Answer 2

Answer:

This question is wrong. The 1st expression should be 9x^2-49y^2 and second expression should be (3x+7y)^2 -84xy.

If you don't correct it, then HCF is 1. If you correct it, then do as follows:

(9x^2-49y^2)=(3x+7y)(3x-7y)

(3x+7y)^2-84xy=9x2+49y^2+42xy-84xy=9x^2+49y^2-42xy

=(3x-7y)^2

So HCF of two expressions is 3x-7y