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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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${\left(-3\right)}^2+\left(-2x\right)^2+\left(-x^2\right)^2+2\cdot -3\cdot -2x+2\cdot -3\left(-1\right)x^2+2\cdot -2\left(-1\right)xx^2$
Learn how to solve special products problems step by step online. Expand the expression (-3-2x-x^2)^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 -3. Multiply -6 times -2. Multiply 2 times -3.