Question

plz answer this in maths. Urgent

Answer 1

I assume we have to expand and simplify.

Part (ii) :

$(a^{2} + b^{2})(a + b)(a - b) = (a^{2} + b^{2})(a^{2} - b^{2}) = a^{4} - b^{4} .$

Part (iii):

$(a^{4} + b^{4})(a^{2} + b^{2})(a + b)(a - b) = (a^{4} + b^{4})(a^{4} - b^{4}) = \underline{\underline{a^{8} - b^{8}}} .$

Note that the whole question is about differences between two squares.