Practice problem
Factorize (ab+cd)2+(ac−bd)2(ab+cd)^2+(ac-bd)^2(ab+cd)2+(ac−bd)2. Check all that are correct.
(a2+d2)(b2+c2)(a^2+d^2)(b^2+c^2)(a2+d2)(b2+c2)
(a3+d2)(b2+c2)(a^3+d^2)(b^2+c^2)(a3+d2)(b2+c2)
(b2+c2)(d2+a2)(b^2+c^2)(d^2+a^2)(b2+c2)(d2+a2)
(a2+d2)(b+c2)(a^2+d^2)(b+c^2)(a2+d2)(b+c2)
(a+d2)(b2+c2)(a+d^2)(b^2+c^2)(a+d2)(b2+c2)
Type a concept, like “slope” or “photosynthesis”.
