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Step-by-step Solution
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Expand the trinomial using the formula $\left(a+b+c\right)^2 = a^2 + b^2 + c^2 + 2ab + 2ac + 2bc$
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$a^2+2^2+\left(-c\right)^2+2\cdot 2a+2\left(-1\right)ac+2\cdot 2\left(-1\right)c$
Learn how to solve special products problems step by step online. Expand the expression (a+2-c)^2. Expand the trinomial using the formula \left(a+b+c\right)^2 = a^2 + b^2 + c^2 + 2ab + 2ac + 2bc. Multiply 2 times 2. Multiply 2 times -1. Multiply 2 times 2.