Question

expand-
(a + 2b + 5c)^2​

Answer 1

Answer:

−^2−4−10−4^2−20−25^2

Answer 2

Answer:

• a^2+2b^2+5c^3+2(a)(2b)+2(2b)(5c)+2(5c)(a)
• a^2+4a^2+25c^2+4ab+30bc+20ac