Factorise x2 - 38x + 72

Convert the cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation. choices: r4 = -4r2 r2 = 4cos2θ r2 = 4sin2θ

If you answer right ill give brainliest, : )

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !