Question

(b) Expand: (3a + 5b -c)^2​

Answer 1

Answer:

Answer:

Step-by-step explanation:

(-3a)^2+(5b)^2+(4c)^2  -2(3a) (5b) +2(5b) (4c) - 2(4c) (3a)9a^2 +25b^2 +16c^2 -30ab +40bc - 24ca

Pls mark as brainliest

Answer 2

Answer:

$\huge\red\boxed{ANSWER}$

Step-by-step explanation:

→ GIVEN :

⇒ they told to expand (3a+5b-c)^2

→ SOLUTION :

⇒ we  know that

   (a+b+c)^2 = a^2+b^2+c^2+2ab+2bc+2ca

   ⇒ here a=3a

                 b=5b

                 c=-c

⇒now,

   ⇒ (3a)^2+(5b)^2+(-c)^2+2(3a)(5b)+2(5b)(-c)+2(-c)(3a)

   ⇒ 9a^2+25b^2+c^2+30ab-10bc-6ac

∴ this is your answer