1.

Polynomial find zero x²+7x-18 ​

Answer»

Step-by-step EXPLANATION:

{x}^{2}  + 7x - 18 \\  {x}^{2}   + 9x - 2x - 18 \\ x(x + 9) - 2(x + 9) \\ (x - 2)(x + 9) \\  \\ x - 2 = 0 \\ x = 2 \\  \\ x + 9 = 0 \\ x =  - 9

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