Question

Write the expansion ​

Answer 1

Answer:

a^2 + b^2 +c^2 + ab + BC + ca

Answer 2

Step-by-step explanation:

$(a + b+ c) {}^{2} = a {}^{2} + b {}^{2} + c {?}^{2} + 2 ab + 2bc + 2ca$

this formula using solve example