Question

(3a-5b)²+((3a+5b)²-(3a-5b)²)+((a²)+(b)²)​

Answer 1

(3a-5b)^2+{(3a-5b)^2-(3a-5b)^2}+{(a^2)+(b^2)}

=(3a-5b)^2+{(3a-5b+3a-5b)(3a-5b-3a+5b)}

+{(a+b)^2-2ab}

=(3a-5b)^2+6a+(a+b)^2-2ab

=(9a^2-30ab+25b^2)+6a+(a+b)^2-2ab