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Jymbo · Answer 1 · 2017-09-09T11:05:03+0000

Substitute the x-value into the expression and solve it. -x^{2} - 4x Substitute all the x variables for 3 -3^{2} - 4(3) Use PEMDAS and start with the exponent (-3^{2} = -3 x -3 = 9) 9 - 4(3) Multiply 9 - 12 Subtract -3

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