Question

(3a+2b-c)² is equal to 9a²+4b²+c² ? -4BC-6ca

Answer 1

Step-by-step explanation:

3a + b + 2c = 3 … Eq. (1)

a + 3b + 2c = 1 … Eq. (2)

Subtract Eq. (2) from Eq. (1) and you get

2a - 2b = 2, or a - b = 1

Thus b = a - 1

Put this value of b in Eq. (1) to get 3a + a - 1 + 2c = 3 or 4a + 2c = 4

So. 2a + c = 2.