Question

(y+40) and (y -60) are the measures of complementary angles. Find the measure
of each angle​

Answer 1

(y+40) (y-60)

Using $(x + a)(x-b) = x^2 + x(a+b) + ab$

$\therefore (y+40)(y-60) \\ \implies y^2 + y(40 -60) + (40)(-60) \\ \implies y^2 -20y -2400$