Question

18. Expand: (a-b+c)2.​

Answer 1

Answer:

a²+b²+c²+2ab+2bc+2ac

Step-by-step explanation:

(a+b+c)x(a+b+c)

axa + axb + axc + bxa + bxb + bxc + cxa + cxb + cxc

= a² + ab + ac + ab + b² + bc + ac + bc +c²

= a²+b²+c²+2ab+2bc+2ac

Answer 2

Answer:

(a-b+c)² = $\bf{\red{a²-b²+c²+ 2 ( ab ) - 2( bc ) + 2( ca ) }}$