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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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$\left(3j\right)^2+\left(-2y\right)^2+1^2+2\cdot 3\cdot -2jy+2\cdot 3\cdot 1j+2\cdot -2\cdot 1y$
Learn how to solve simplification of algebraic expressions problems step by step online. Simplify the expression (3j-2y+1)^2. Expand the trinomial using the formula \left(a+b+c\right)^2 = a^2 + b^2 + c^2 + 2ab + 2ac + 2bc. Any expression multiplied by 1 is equal to itself. Any expression multiplied by 1 is equal to itself. Multiply 2 times 3.