Question

using suitable identity expand (a + 2 b + 3 c) square​

Answer 1

${(a + 2b + 3c)}^{2} \\ = {a}^{2} + {(2b)}^{2} + {(3c)}^{2} + 2 \times a \times 2b + 2 \times (2b) \times 3c + 2 \times a \times 3c \\ = {a }^{2} + 4 {b}^{2} + 9 {c}^{2} + 4ab + 12bc + 6ac$

Hope it will help you

Answer 2

Answer:

4a²+b²+9c²+4ab-6bc-12ax