what is the square root of 98 what is the square root of y to the 6th what is the square root of a to the 7th what is the square root of 12x^3y^2 what is the square root of 36x^2y^4 what is the square root of 48ab^3 what is the square root of 10a^5b^2 what is the square root of 20x^3y^10