Question

Упростите выражение

Answer 1

$(3-b)(3+b)(9+b^2)+(4+b^2)^2 = (9-b^2)(9+b^2)+16+8b^2+b^4 =$
$=81-b^4+16+8b^2+b^4 = 97+8b^2$
$97+8* (frac{1}{2})^2 = 99$